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Bedini A, Boutin JA, Legros C, Zlotos DP, Spadoni G. Industrial and academic approaches to the search for alternative melatonin receptor ligands: An historical survey. J Pineal Res 2024; 76:e12953. [PMID: 38682544 DOI: 10.1111/jpi.12953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Revised: 03/05/2024] [Accepted: 03/24/2024] [Indexed: 05/01/2024]
Abstract
The search for melatonin receptor agonists formed the main part of melatonin medicinal chemistry programs for the last three decades. In this short review, we summarize the two main aspects of these programs: the development of all the necessary tools to characterize the newly synthesized ligands at the two melatonin receptors MT1 and MT2, and the medicinal chemist's approaches to find chemically diverse ligands at these receptors. Both strategies are described. It turns out that the main source of tools were industrial laboratories, while the medicinal chemistry was mainly carried out in academia. Such complete accounts are interesting, as they delineate the spirits in which the teams were working demonstrating their strength and innovative character. Most of the programs were focused on nonselective agonists and few of them reached the market. In contrast, discovery of MT1-selective agonists and melatonergic antagonists with proven in vivo activity and MT1 or MT2-selectivity is still in its infancy, despite the considerable interest that subtype selective compounds may bring in the domain, as the physiological respective roles of the two subtypes of melatonin receptors, is still poorly understood. Poly-pharmacology applications and multitarget ligands have also been considered.
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MESH Headings
- Ligands
- Humans
- Animals
- Receptor, Melatonin, MT2/metabolism
- Receptor, Melatonin, MT2/agonists
- Receptor, Melatonin, MT1/metabolism
- Receptor, Melatonin, MT1/agonists
- Receptor, Melatonin, MT1/antagonists & inhibitors
- Receptors, Melatonin/metabolism
- Receptors, Melatonin/agonists
- Melatonin/metabolism
- History, 20th Century
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Affiliation(s)
- Annalida Bedini
- Dipartimento di Scienze Biomolecolari, Università degli Studi di Urbino Carlo Bo, Urbino, Italy
| | - Jean A Boutin
- Laboratory of Neuroendocrine Endocrine and Germinal Differentiation and Communication (NorDiC), Univ Rouen Normandie, Inserm, NorDiC, Rouen, France
| | | | - Darius P Zlotos
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy and Biotechnology, The German University in Cairo, New Cairo City, Egypt
| | - Gilberto Spadoni
- Dipartimento di Scienze Biomolecolari, Università degli Studi di Urbino Carlo Bo, Urbino, Italy
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2
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Helmi YY, Papenkordt N, Rennar G, Gbahou F, El-Hady AK, Labani N, Schmidtkunz K, Boettcher S, Jockers R, Abdel-Halim M, Jung M, Zlotos DP. Melatonin-vorinostat hybrid ligands show higher histone deacetylase and cancer cell growth inhibition than vorinostat. Arch Pharm (Weinheim) 2023; 356:e2300149. [PMID: 37339785 DOI: 10.1002/ardp.202300149] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 05/31/2023] [Accepted: 06/01/2023] [Indexed: 06/22/2023]
Abstract
Anticancer drug conjugates are an emerging approach for future cancer treatment. Here, we report a series of hybrid ligands merging the neurohormone melatonin with the approved histone deacetylase (HDAC) inhibitor vorinostat, using melatonin's amide side chain (3a-e), its indolic nitrogen (5a-d), and its ether oxygen (7a-d) as attachment points. Several hybrid ligands showed higher potency thanvorinostat in both HDAC inhibition and cellular assays on different cultured cancer cell lines. In the most potent HDAC1 and HDAC6 inhibitors, 3e, 5c, and 7c, the hydroxamic acid moiety of vorinostat is linked to melatonin through a hexamethylene spacer. Hybrid ligands 5c and 7c were also found to be potent growth inhibitors of MCF-7, PC-3M-Luc, and HL-60 cancer cell lines. As these compounds showed only weak agonist activity at melatonin MT1 receptors, the findings indicate that their anticancer actions are driven by HDAC inhibition.
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Affiliation(s)
- Youssef Y Helmi
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy and Biotechnology, The German University in Cairo, New Cairo City, Cairo, Egypt
| | - Niklas Papenkordt
- Institute of Pharmaceutical Sciences, University of Freiburg, Freiburg, Germany
| | - Georg Rennar
- Institute of Pharmaceutical Sciences, University of Freiburg, Freiburg, Germany
| | - Florence Gbahou
- Université Paris Cité, Institut Cochin, INSERM, CNRS, Paris, France
| | - Ahmed K El-Hady
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy and Biotechnology, The German University in Cairo, New Cairo City, Cairo, Egypt
- Department of Organic and Pharmaceutical Chemistry, School of Life and Medical Sciences, University of Hertfordshire hosted by Global Academic Foundation, New Administrative Capitol, Cairo, Egypt
| | - Nedjma Labani
- Université Paris Cité, Institut Cochin, INSERM, CNRS, Paris, France
| | - Karin Schmidtkunz
- Institute of Pharmaceutical Sciences, University of Freiburg, Freiburg, Germany
| | - Stefan Boettcher
- Pharmaceutical and Medicinal Chemistry, Saarland University, Saarbruecken, Germany
| | - Ralf Jockers
- Université Paris Cité, Institut Cochin, INSERM, CNRS, Paris, France
| | - Mohammad Abdel-Halim
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy and Biotechnology, The German University in Cairo, New Cairo City, Cairo, Egypt
| | - Manfred Jung
- Institute of Pharmaceutical Sciences, University of Freiburg, Freiburg, Germany
| | - Darius P Zlotos
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy and Biotechnology, The German University in Cairo, New Cairo City, Cairo, Egypt
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Gbahou F, Levin S, Tikhonova IG, Somalo Barranco G, Izabelle C, Ohana RF, Jockers R. Luminogenic HiBiT Peptide-Based NanoBRET Ligand Binding Assays for Melatonin Receptors. ACS Pharmacol Transl Sci 2022; 5:668-678. [DOI: 10.1021/acsptsci.2c00096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2022] [Indexed: 11/28/2022]
Affiliation(s)
- Florence Gbahou
- Université Paris Cité, Institut Cochin, INSERM, CNRS, 75014 Paris, France
| | - Sergiy Levin
- Promega Corporation, Fitchburg, Wisconsin 53711, United States
| | - Irina G. Tikhonova
- School of Pharmacy, Medical Biology Centre, Queen’s University Belfast, Belfast BT9 7BL, United Kingdom
| | | | - Charlotte Izabelle
- Université Paris Cité, Institut Cochin, INSERM, CNRS, 75014 Paris, France
| | | | - Ralf Jockers
- Université Paris Cité, Institut Cochin, INSERM, CNRS, 75014 Paris, France
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4
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Yu Y, Qiu J, Cao J, Guo Y, Bai H, Wei S, Yan P. Effects of prolonged photoperiod on growth performance, serum lipids and meat quality of Jinjiang cattle in winter. Anim Biosci 2021; 34:1569-1578. [PMID: 33677914 PMCID: PMC8495339 DOI: 10.5713/ab.20.0750] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Accepted: 02/02/2021] [Indexed: 02/04/2023] Open
Abstract
Objective This study was conducted to investigate the potential effects of prolonged photoperiod on the serum lipids, carcass traits, and meat quality of Jinjiang cattle during winter. Methods Thirty-four Jinjiang bulls aged between 14 and 16 months were randomly assigned to two groups that were alternatively subjected to either natural daylight +4 h supplemental light (long photoperiod, LP) or natural daylight (natural photoperiod, NP) for 96 days. The potential effects on the levels of serum lipids, carcass traits, meat quality, and genes regulating lipid metabolism in the intramuscular fat (IMF) of the cattle were evaluated. Results Jinjiang cattle kept under LP showed significant increase in both dry matter intake and backfat thickness. the serum glucose and the plasma leptin levels were significantly reduced, while that of melatonin and insulin were observed to be increased. The crude fat contents of biceps femoris muscle and longissimus dorsi muscle were higher in LP than in NP group. In longissimus dorsi muscle, the proportions of C17:0 and C18:0 were significantly higher but that of the C16:1 was found to be significantly lower in LP group. The relative mRNA expressions in IMF of longissimus dorsi muscle, the lipid synthesis genes (proliferator-activated receptor gamma, fatty acid-binding protein) and the fatty acid synthesis genes (acetyl-coa carboxylase, fatty acid synthetase, 1-acylglycerol-3-phosphate acyltransferase) were significantly up-regulated in LP group (p<0.05); whereas the hormone-sensitive lipase and stearoyl-CoA desaturase 1 were significantly down-regulated in LP than in NP group. Conclusion Prolonged photoperiod significantly altered the growth performance, hormonal levels, gene expression and fat deposition in Jinjiang cattle. It suggested that the LP improved the fat deposition by regulating the levels of different hormones and genes related to lipid metabolism, thereby improving the fattening of Jinjiang cattle during winter.
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Affiliation(s)
- Yan Yu
- Department of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Jingyun Qiu
- Department of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Jincheng Cao
- Department of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Yingying Guo
- Department of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Hui Bai
- Department of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Shengjuan Wei
- Department of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Peishi Yan
- Department of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
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Zlotos DP, Abdelmalek CM, Botros LS, Banoub MM, Mandour YM, Breitinger U, El Nady A, Breitinger HG, Sotriffer C, Villmann C, Jensen AA, Holzgrabe U. C-2-Linked Dimeric Strychnine Analogues as Bivalent Ligands Targeting Glycine Receptors. JOURNAL OF NATURAL PRODUCTS 2021; 84:382-394. [PMID: 33596384 DOI: 10.1021/acs.jnatprod.0c01030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Strychnine is the prototypic antagonist of glycine receptors, a family of pentameric ligand-gated ion channels. Recent high-resolution structures of homomeric glycine receptors have confirmed the presence of five orthosteric binding sites located in the extracellular subunit interfaces of the receptor complex that are targeted by strychnine. Here, we report the synthesis and extensive pharmacological evaluation of bivalent ligands composed of two strychnine pharmacophores connected by appropriate spacers optimized toward simultaneous binding to two adjacent orthosteric sites of homomeric α1 glycine receptors. In all bivalent ligands, the two strychnine units were linked through C-2 by amide spacers of various lengths ranging from 6 to 69 atoms. Characterization of the compounds in two functional assays and in a radioligand binding assay indicated that compound 11a, with a spacer consisting of 57 atoms, may be capable of bridging the homomeric α1 GlyRs by simultaneous occupation of two adjacent strychnine-binding sites. The findings are supported by docking experiments to the crystal structure of the homomeric glycine receptor. Based on its unique binding mode, its relatively high binding affinity and antagonist potency, and its slow binding kinetics, the bivalent strychnine analogue 11a could be a valuable tool to study the functional properties of glycine receptors.
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Affiliation(s)
- Darius P Zlotos
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy and Biotechnology, The German University in Cairo, New Cairo City, 11835 Cairo, Egypt
| | - Carine M Abdelmalek
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy and Biotechnology, The German University in Cairo, New Cairo City, 11835 Cairo, Egypt
| | - Liza S Botros
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy and Biotechnology, The German University in Cairo, New Cairo City, 11835 Cairo, Egypt
| | - Maha M Banoub
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy and Biotechnology, The German University in Cairo, New Cairo City, 11835 Cairo, Egypt
| | - Yasmine M Mandour
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy and Biotechnology, The German University in Cairo, New Cairo City, 11835 Cairo, Egypt
- School of Life and Medical Sciences, University of Hertfordshire hosted by Global Academic Foundation, New Administrative Capitol, 11865 Cairo, Egypt
| | - Ulrike Breitinger
- Department of Biochemistry, Faculty of Pharmacy and Biotechnology, The German University in Cairo, New Cairo City, 11835 Cairo, Egypt
| | - Ahmed El Nady
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy and Biotechnology, The German University in Cairo, New Cairo City, 11835 Cairo, Egypt
| | - Hans-Georg Breitinger
- Department of Biochemistry, Faculty of Pharmacy and Biotechnology, The German University in Cairo, New Cairo City, 11835 Cairo, Egypt
| | - Christoph Sotriffer
- Institute of Pharmacy and Food Chemistry, University of Würzburg, 97074 Würzburg, Germany
| | - Carmen Villmann
- Institute of Clinical Neurobiology, University Hospital, University of Würzburg, 97078 Würzburg, Germany
| | - Anders A Jensen
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, DK-2100 Copenhagen, Denmark
| | - Ulrike Holzgrabe
- Institute of Pharmacy and Food Chemistry, University of Würzburg, 97074 Würzburg, Germany
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6
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Boutin JA, Witt-Enderby PA, Sotriffer C, Zlotos DP. Melatonin receptor ligands: A pharmaco-chemical perspective. J Pineal Res 2020; 69:e12672. [PMID: 32531076 DOI: 10.1111/jpi.12672] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 05/19/2020] [Accepted: 06/04/2020] [Indexed: 12/14/2022]
Abstract
Melatonin MT1 and MT2 receptor ligands have been vigorously explored for the last 4 decades. Inspection of approximately 80 publications in the field revealed that most melatonergic ligands were structural analogues of melatonin combining three essential features of the parent compound: an aromatic ring bearing a methoxy group and an amide side chain in a relative arrangement similar to that present in melatonin. While several series of MT2 -selective agents-agonists, antagonists, or partial agonists-were reported, the field was lacking MT1 -selective agents. Herein, we describe various approaches toward the development of melatonergic ligands, keeping in mind that most of the molecules/pharmacophores obtained were essentially melatonin copies, even though diverse tri- or tetra-cyclic compounds were explored. In addition to lack of structural diversity, only few studies examined the activity of the reported melatonergic ligands in vivo. Moreover, an extensive pharmacological characterization including biopharmaceutical stability, pharmacokinetic properties, specificity toward other major receptors to name a few remained scarce. For example, many of the antagonists described were not stable in vivo, were not selective for the melatonin receptor subtype of interest, and were not fully characterized from a pharmacological standpoint. Indeed, virtual screening of large compound libraries has led to the recent discovery of potent and selective melatonin receptor agonists and partial agonists of new chemotypes. Having said this, the melatonergic field is still lacking subtype-selective melatonin receptor antagonists "active" in vivo, which are critical to our understanding of melatonin and melatonin receptors' role in basic physiology and disease.
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MESH Headings
- Animals
- Humans
- Ligands
- Melatonin/chemistry
- Receptor, Melatonin, MT1/agonists
- Receptor, Melatonin, MT1/antagonists & inhibitors
- Receptor, Melatonin, MT1/chemistry
- Receptor, Melatonin, MT2/agonists
- Receptor, Melatonin, MT2/antagonists & inhibitors
- Receptor, Melatonin, MT2/chemistry
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Affiliation(s)
- Jean A Boutin
- Institut de Recherches Internationales SERVIER, Suresnes, France
| | - Paula A Witt-Enderby
- School of Pharmacy & Graduate School of Pharmaceutical, Administrative and Social Sciences, Duquesne University, Pittsburg, PA, USA
| | - Christoph Sotriffer
- Institute of Pharmacy and Food Chemistry, University of Würzburg, Würzburg, Germany
| | - Darius P Zlotos
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy and Biotechnology, The German University in Cairo, New Cairo City, Egypt
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7
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Wang SY, Shi XC, Laborda P. Indole-based melatonin analogues: Synthetic approaches and biological activity. Eur J Med Chem 2020; 185:111847. [DOI: 10.1016/j.ejmech.2019.111847] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Revised: 11/01/2019] [Accepted: 11/01/2019] [Indexed: 12/11/2022]
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8
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Stauch B, Johansson LC, Cherezov V. Structural insights into melatonin receptors. FEBS J 2019; 287:1496-1510. [PMID: 31693784 DOI: 10.1111/febs.15128] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Revised: 10/16/2019] [Accepted: 11/05/2019] [Indexed: 12/22/2022]
Abstract
The long-anticipated high-resolution structures of the human melatonin G protein-coupled receptors MT1 and MT2 , involved in establishing and maintaining circadian rhythm, were obtained in complex with two melatonin analogs and two approved anti-insomnia and antidepression drugs using X-ray free-electron laser serial femtosecond crystallography. The structures shed light on the overall conformation and unusual structural features of melatonin receptors, as well as their ligand binding sites and the melatonergic pharmacophore, thereby providing insights into receptor subtype selectivity. The structures revealed an occluded orthosteric ligand binding site with a membrane-buried channel for ligand entry in both receptors, and an additional putative ligand entry path in MT2 from the extracellular side. This unexpected ligand entry mode contributes to facilitating the high specificity with which melatonin receptors bind their cognate ligand and exclude structurally similar molecules such as serotonin, the biosynthetic precursor of melatonin. Finally, the MT2 structure allowed accurate mapping of type 2 diabetes-related single-nucleotide polymorphisms, where a clustering of residues in helices I and II on the protein-membrane interface was observed which could potentially influence receptor oligomerization. The role of receptor oligomerization is further discussed in light of the differential interaction of MT1 and MT2 with GPR50, a regulatory melatonin coreceptor. The melatonin receptor structures will facilitate design of selective tool compounds to further dissect the specific physiological function of each receptor subtype as well as provide a structural basis for next-generation sleeping aids and other drugs targeting these receptors with higher specificity and fewer side effects.
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Affiliation(s)
- Benjamin Stauch
- Bridge Institute, USC Michelson Center for Convergent Biosciences, University of Southern California, Los Angeles, CA, USA.,Department of Chemistry, University of Southern California, Los Angeles, CA, USA
| | - Linda C Johansson
- Bridge Institute, USC Michelson Center for Convergent Biosciences, University of Southern California, Los Angeles, CA, USA.,Department of Chemistry, University of Southern California, Los Angeles, CA, USA
| | - Vadim Cherezov
- Bridge Institute, USC Michelson Center for Convergent Biosciences, University of Southern California, Los Angeles, CA, USA.,Department of Chemistry, University of Southern California, Los Angeles, CA, USA.,Department of Biological Sciences, University of Southern California, Los Angeles, CA, USA
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9
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Cecon E, Liu L, Jockers R. Melatonin receptor structures shed new light on melatonin research. J Pineal Res 2019; 67:e12606. [PMID: 31442321 DOI: 10.1111/jpi.12606] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 08/17/2019] [Accepted: 08/18/2019] [Indexed: 01/02/2023]
Abstract
The tryptophan derivative melatonin is an evolutionary old molecule that is involved in a pleiotropy of physiological functions. In humans, age-related decline of circulating melatonin levels and/or dysregulation of its circadian synthesis pattern have been associated with several disorders and disease states. Several molecular targets have been proposed for melatonin since its discovery, in 1959. Among them, melatonin MT1 and MT2 receptors are the best characterized melatonin targets, mediating melatonin effects in a variety of tissues. They belong to the superfamily of G protein-coupled receptors. Two back-to-back articles published in the "Nature" Journal earlier this year present the first crystal structures of the human MT1 and MT2 in its inactive states. Here, we will briefly outline the discovery path of melatonin receptors until their structural elucidation and discuss how these new findings will guide future research toward a better understanding of their function and rational drug design.
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MESH Headings
- Animals
- History, 20th Century
- History, 21st Century
- Humans
- Melatonin/chemistry
- Melatonin/history
- Melatonin/metabolism
- Protein Structure, Tertiary
- Receptor, Melatonin, MT1/chemistry
- Receptor, Melatonin, MT1/metabolism
- Receptor, Melatonin, MT2/chemistry
- Receptor, Melatonin, MT2/metabolism
- Signal Transduction
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Affiliation(s)
- Erika Cecon
- Institut Cochin, CNRS, INSERM, Université de Paris, Paris, France
| | - Lei Liu
- Institut Cochin, CNRS, INSERM, Université de Paris, Paris, France
- Cellular Signaling Laboratory, International Research Center for Sensory Biology and Technology of MOST, Key Laboratory of Molecular Biophysics of Ministry of Education, School of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, China
| | - Ralf Jockers
- Institut Cochin, CNRS, INSERM, Université de Paris, Paris, France
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10
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Moiseeva AA, Artyushin OI, Anikina LV, Brel VK. Synthesis and antitumor activity of daunorubicin conjugates with of 3,4-methylendioxybenzaldehyde. Bioorg Med Chem Lett 2019; 29:126617. [PMID: 31431363 DOI: 10.1016/j.bmcl.2019.08.021] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 08/10/2019] [Accepted: 08/11/2019] [Indexed: 12/18/2022]
Abstract
The design of hybrid (chimeric) molecules containing two different pharmacophores connected via a spacer (linker) is a promising approach to the functionalization of natural compounds and potentially of drug molecules. These are important examples for the use of this approach with anthracycline antibiotics. The use of this methodology may help to eliminate some of the drawbacks of anthracycline drugs, e.g., high cardiotoxicity and MDR development.
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Affiliation(s)
- Aleksandra A Moiseeva
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, ul. Vavilova 28, Moscow 119991, Russia
| | - Oleg I Artyushin
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, ul. Vavilova 28, Moscow 119991, Russia
| | - Lada V Anikina
- Institute of Physiologically Active Compounds, Russian Academy of Sciences, 1 Severny pr., Chernogolovka 142432, Russia
| | - Valery K Brel
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, ul. Vavilova 28, Moscow 119991, Russia.
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