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Shi Y, Li J, Wolf CA, Liu S, Sharma SS, Wolber G, Bureik M, Clark BR. Expected and Unexpected Products from the Biochemical Oxidation of Bacterial Alkylquinolones with CYP4F11. JOURNAL OF NATURAL PRODUCTS 2023; 86:2502-2513. [PMID: 37939299 DOI: 10.1021/acs.jnatprod.3c00689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2023]
Abstract
2-Alkylquinolones are a class of microbial natural products primarily produced in the Pseudomonas and Burkholderia genera that play a key role in modulating quorum sensing. Bacterial alkylquinolones were synthesized and then subjected to oxidative biotransformation using human cytochrome P450 enzyme CYP4F11, heterologously expressed in the fission yeast Schizosaccharomyces pombe. This yielded a range of hydroxylated and carboxylic acid derivatives which had undergone ω-oxidation of the 2-alkyl chain, the structures of which were determined by analysis of NMR and MS data. Oxidation efficiency depended on chain length, with a chain length of eight or nine carbon atoms proving optimal for high yields. Homology modeling suggested that Glu233 was relevant for binding, due to the formation of a hydrogen bond from the quinolone nitrogen to Glu233, and in this position only the longer alkyl chains could come close enough to the heme moiety for effective oxidation. In addition to the direct oxidation products, a number of esters were also isolated, which was attributed to the action of endogenous yeast enzymes on the newly formed ω-hydroxy-alkylquinolones. ω-Oxidation of the alkyl chain significantly reduced the antimicrobial and antibiofilm activity of the quinolones.
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Affiliation(s)
- Yue Shi
- School of Pharmaceutical Science and Technology, Tianjin University, 92 Weijin Road, Tianjin 300072, People's Republic of China
| | - Jianye Li
- Hebei Key Laboratory of Heterocyclic Compounds, College of Chemical Engineering and Materials, Handan University, Handan 056005, Hebei Province, People's Republic of China
| | - Clemens Alexander Wolf
- Molecular Design Lab, Freie Universität Berlin, Institute of Pharmacy, Pharmaceutical and Medicinal Chemistry, Königin-Luise-Straße 2 + 4, 14195 Berlin, Germany
| | - Sijie Liu
- Molecular Design Lab, Freie Universität Berlin, Institute of Pharmacy, Pharmaceutical and Medicinal Chemistry, Königin-Luise-Straße 2 + 4, 14195 Berlin, Germany
| | - Sangeeta S Sharma
- School of Pharmaceutical Science and Technology, Tianjin University, 92 Weijin Road, Tianjin 300072, People's Republic of China
| | - Gerhard Wolber
- Molecular Design Lab, Freie Universität Berlin, Institute of Pharmacy, Pharmaceutical and Medicinal Chemistry, Königin-Luise-Straße 2 + 4, 14195 Berlin, Germany
| | - Matthias Bureik
- School of Pharmaceutical Science and Technology, Tianjin University, 92 Weijin Road, Tianjin 300072, People's Republic of China
| | - Benjamin R Clark
- School of Pharmaceutical Science and Technology, Tianjin University, 92 Weijin Road, Tianjin 300072, People's Republic of China
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2
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Mollova-Sapundzhieva Y, Angelov P, Georgiev D, Yanev P. Synthetic approach to 2-alkyl-4-quinolones and 2-alkyl-4-quinolone-3-carboxamides based on common β-keto amide precursors. Beilstein J Org Chem 2023; 19:1804-1810. [PMID: 38033452 PMCID: PMC10682542 DOI: 10.3762/bjoc.19.132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Accepted: 11/16/2023] [Indexed: 12/02/2023] Open
Abstract
β-Keto amides were used as convenient precursors to both 2-alkyl-4-quinolones and 2-alkyl-4-quinolone-3-carboxamides. The utility of this approach is demonstrated with the synthesis of fourteen novel and four known quinolone derivatives, including natural products of microbial origin such as HHQ and its C5-congener. Two compounds with high activity against S. aureus have been identified among the newly obtained quinolones, with MICs ≤ 3.12 and ≤ 6.25 µg/mL, respectively.
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Affiliation(s)
- Yordanka Mollova-Sapundzhieva
- Department of Organic Chemistry, University of Plovdiv Paisii Hilendarski, 24 Tsar Asen Str., 4000 Plovdiv, Bulgaria
| | - Plamen Angelov
- Department of Organic Chemistry, University of Plovdiv Paisii Hilendarski, 24 Tsar Asen Str., 4000 Plovdiv, Bulgaria
| | - Danail Georgiev
- Department of Biochemistry and Microbiology, University of Plovdiv Paisii Hilendarski, 24 Tsar Asen Str., 4000 Plovdiv, Bulgaria
| | - Pavel Yanev
- Department of Organic Chemistry, University of Plovdiv Paisii Hilendarski, 24 Tsar Asen Str., 4000 Plovdiv, Bulgaria
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Shi Y, Wolf CA, Lotfy R, Sharma SS, Tesfa AF, Wolber G, Bureik M, Clark BR. Deciphering the biotransformation mechanism of dialkylresorcinols by CYP4F11. Bioorg Chem 2023; 131:106330. [PMID: 36565673 DOI: 10.1016/j.bioorg.2022.106330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 11/15/2022] [Accepted: 12/14/2022] [Indexed: 12/23/2022]
Abstract
Cytochrome P450 enzymes (CYPs) are one of the most important classes of oxidative enzymes in the human body, carrying out metabolism of various exogenous and endogenous substrates. In order to expand the knowledge of these enzymes' specificity and to obtain new natural product derivatives, CYP4F11, a cytochrome P450 monooxygenase, was used in the biotransformation of dialkylresorcinols 1 and 2, a pair of antibiotic microbial natural products. This investigation resulted in four biotransformation products including two oxidative products: a hydroxylated derivative (3) and a carboxylic acid derivative (4). In addition, acetylated (5) and esterified products (6) were isolated, formed by further metabolism by endogenous yeast enzymes. Oxidative transformations were highly regioselective, and took place exclusively at the ω-position of the C-5 alkyl chain. Homology modeling studies revealed that optimal hydrogen bonding between 2 and the enzyme can only be established with the C-5 alkyl chain pointing towards the heme. The closely-related CYP4F12 was not capable of oxidizing the dialkylresorcinol 2. Modeling experiments rationalize these differences by the different shapes of the binding pockets with respect to the non-oxidized alkyl chain. Antimicrobial testing indicated that the presence of polar groups on the side-chains reduces the antibiotic activity of the dialkylresorcinols.
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Affiliation(s)
- Yue Shi
- School of Pharmaceutical Science and Technology, Tianjin University, 92, Weijin Road, Tianjin 300092, People's Republic of China
| | - Clemens A Wolf
- Molecular Design Lab, Freie Universität Berlin, Institute of Pharmacy, Pharmaceutical and Medicinal Chemistry, Königin-Luise-Straße, 2 + 4, 14195 Berlin, Germany
| | - Rowaa Lotfy
- Molecular Design Lab, Freie Universität Berlin, Institute of Pharmacy, Pharmaceutical and Medicinal Chemistry, Königin-Luise-Straße, 2 + 4, 14195 Berlin, Germany
| | - Sangeeta S Sharma
- School of Pharmaceutical Science and Technology, Tianjin University, 92, Weijin Road, Tianjin 300092, People's Republic of China
| | - Abel Fekadu Tesfa
- School of Pharmaceutical Science and Technology, Tianjin University, 92, Weijin Road, Tianjin 300092, People's Republic of China
| | - Gerhard Wolber
- Molecular Design Lab, Freie Universität Berlin, Institute of Pharmacy, Pharmaceutical and Medicinal Chemistry, Königin-Luise-Straße, 2 + 4, 14195 Berlin, Germany
| | - Matthias Bureik
- School of Pharmaceutical Science and Technology, Tianjin University, 92, Weijin Road, Tianjin 300092, People's Republic of China
| | - Benjamin R Clark
- School of Pharmaceutical Science and Technology, Tianjin University, 92, Weijin Road, Tianjin 300092, People's Republic of China.
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4
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Novel quinazolinone disulfide analogues as pqs quorum sensing inhibitors against Pseudomonas aeruginosa. Bioorg Chem 2023; 130:106226. [DOI: 10.1016/j.bioorg.2022.106226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 10/09/2022] [Accepted: 10/21/2022] [Indexed: 11/18/2022]
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5
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Ultrasound-Assisted Wittig Reaction for the Synthesis of 3-Substituted 4-Chloroquinolines and Quinolin-4(1H)-ones with Extended π-Conjugated Systems. J CHEM-NY 2022. [DOI: 10.1155/2022/4807767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
3-(Vinyl-/buta-1,3-dien-1-yl/4-phenylbuta-1,3-dien-1-yl)-4-chloro quinolines and quinolin-4(1H)-ones were synthesized by ultrasound-assisted Wittig reaction of the corresponding 4-chloro-3-formylquinoline and 3-formylquinolin-4(1H)-ones with nonstabilized ylides. Ease execution, mild conditions, and high yields make this method exploitable for the generation of libraries of 3-substituted 4-chloroquinolines and quinolin-4(1H)-ones with extended π-conjugated systems. To demonstrate the usefulness of these compounds as precursors for the synthesis of more complex structures, 3-vinylquinolin-4(1H)-ones were used as dienes in the Diels–Alder reaction with N-methylmaleimide to produce novel acridone derivatives. The attempted Diels–Alder reaction with 3-(buta-1,3-dien-1-yl)quinolin-4(1H)-one did not afford the expected cycloadduct; instead, 2-methyl-2H-pyrano[3,2-c]quinoline was obtained. The structures and stereochemistry of the new compounds were established by NMR studies.
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Yoneyama T, Elshamy AI, Yamada J, El-Kashak WA, Kasai Y, Imagawa H, Ban S, Noji M, Umeyama A. Antimicrobial metabolite of Cordyceps tenuipes targeting MurE ligase and histidine kinase via in silico study. Appl Microbiol Biotechnol 2022; 106:6483-6491. [DOI: 10.1007/s00253-022-12176-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 08/10/2022] [Accepted: 09/07/2022] [Indexed: 11/02/2022]
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Sharma V, Das R, Kumar Mehta D, Gupta S, Venugopala KN, Mailavaram R, Nair AB, Shakya AK, Kishore Deb P. Recent insight into the biological activities and SAR of quinolone derivatives as multifunctional scaffold. Bioorg Med Chem 2022; 59:116674. [DOI: 10.1016/j.bmc.2022.116674] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 02/07/2022] [Accepted: 02/13/2022] [Indexed: 01/09/2023]
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Lu N, Liang H, Miao C, Lan X, Qian P. Theoretical investigation of the mechanism of DMAP-promoted [4 + 2]-annulation of prop-2-ynylsulfonium with isatoic anhydride. CAN J CHEM 2022. [DOI: 10.1139/cjc-2021-0174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The mechanism for DMAP-promoted [4 + 2]-annulation of prop-2-ynylsulfonium with isatoic anhydride is investigated using the M06-2X functional. The reaction comprises isomerization of prop-2-ynylsulfonium in stage 1. Stage 2 includes DMAP-promoted deprotonation, nucleophilic addition, ring opening, and decarboxylation. Three steps of intramolecular cycloaddition, DMAP-promoted protonation, and dealkylation occur in stage 3, generating methylated DMAP and neutral thioether, which undergo double-bond isomerization to yield 3-methylthio-4-quinolone. The ability of DMAP to promote the reaction lies in the barrier decrease for alkyne isomerization, deprotonation/protonation of allenes, and dealkylation as effective bases for transferring protons and methyl groups. The roles of prop-2-ynylsulfonium and isatoic anhydride were demonstrated to be C2 and C4 synthons via Multiwfn analysis on the frontier molecular orbital. An alternative path was also confirmed by the Mayer bond order of the vital transition states.
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Affiliation(s)
- Nan Lu
- College of Chemistry and Material Science, Shandong Agricultural University, Taian City, Shandong Prov. 271018, P.R. China
- College of Chemistry and Material Science, Shandong Agricultural University, Taian City, Shandong Prov. 271018, P.R. China
| | - Hui Liang
- College of Chemistry and Material Science, Shandong Agricultural University, Taian City, Shandong Prov. 271018, P.R. China
- College of Chemistry and Material Science, Shandong Agricultural University, Taian City, Shandong Prov. 271018, P.R. China
| | - Chengxia Miao
- College of Chemistry and Material Science, Shandong Agricultural University, Taian City, Shandong Prov. 271018, P.R. China
- College of Chemistry and Material Science, Shandong Agricultural University, Taian City, Shandong Prov. 271018, P.R. China
| | - Xiaozheng Lan
- College of Chemistry and Material Science, Shandong Agricultural University, Taian City, Shandong Prov. 271018, P.R. China
- College of Chemistry and Material Science, Shandong Agricultural University, Taian City, Shandong Prov. 271018, P.R. China
| | - Ping Qian
- College of Chemistry and Material Science, Shandong Agricultural University, Taian City, Shandong Prov. 271018, P.R. China
- College of Chemistry and Material Science, Shandong Agricultural University, Taian City, Shandong Prov. 271018, P.R. China
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9
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Liu X, Dong Y, Alizade V, Khutsishvili M, Atha D, Borris RP, Clark BR. Molecular networking-driven isolation of 8'-Glycosylated biscoumarins from Cruciata articulata. PHYTOCHEMISTRY 2021; 190:112856. [PMID: 34233243 DOI: 10.1016/j.phytochem.2021.112856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 06/16/2021] [Accepted: 06/25/2021] [Indexed: 06/13/2023]
Abstract
A molecular networking-guided phytochemical investigation of Cruciata articulata led to the isolation of five unreported biscoumarins, four of which were characterized by a shared 6-methoxy-7,8'-dihydroxy-3,7'-biscoumarin aglycone. These were isolated alongside two known coumarin glycosides, daphnetin-8-O-β-D-glucoside and 6'-acetoxy-daphnetin-8-O-β-D-glucoside. Their structures were elucidated by extensive 1D and 2D NMR experiments, in combination with chemical transformation and MS/MS fragmentation analysis. Four of the biscoumarins were glycosylated at the 8' position: these are the first examples of this substitution pattern to be described in nature. All compounds were tested for cytotoxic, antimicrobial, anti-inflammatory, and α-glucosidase inhibitory properties, but did not display significant activity.
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Affiliation(s)
- Xueling Liu
- School of Pharmaceutical Science and Technology, Health Sciences Platform, Tianjin University, Tianjin, 300072, China
| | - Yuyu Dong
- School of Pharmaceutical Science and Technology, Health Sciences Platform, Tianjin University, Tianjin, 300072, China
| | - Valida Alizade
- Institute of Botany, Azerbaijan National Academy of Sciences, Baku, AZ1102, Azerbaijan
| | - Manana Khutsishvili
- National Herbarium of Georgia, Ilia State University, Tbilisi, 100995, Georgia
| | | | - Robert P Borris
- School of Pharmaceutical Science and Technology, Health Sciences Platform, Tianjin University, Tianjin, 300072, China
| | - Benjamin R Clark
- School of Pharmaceutical Science and Technology, Health Sciences Platform, Tianjin University, Tianjin, 300072, China.
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Liu X, Wang Y, Alizade V, Khutsishvili M, Atha D, Borris RP, Clark BR. Cruciasides C-G, monoterpenoid glycosides from Cruciata articulata. PHYTOCHEMISTRY 2021; 189:112821. [PMID: 34107434 DOI: 10.1016/j.phytochem.2021.112821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 05/03/2021] [Accepted: 05/19/2021] [Indexed: 06/12/2023]
Abstract
Cruciata articulata (L.) Ehrend. is a herbaceous species distributed in parts of Western Asia and the Mediterranean region. While research on other species in the Cruciata genus has revealed the presence of a range of flavonoids and terpenoids, few such studies have been conducted on C. articulata. Thus, in the current study, a phytochemical investigation of C. articulata was carried out. Molecular networking identified a large cluster of compounds sharing distinctive MS-MS fragmentation patterns that were targeted for isolation, leading to the isolation of five undescribed monoterpenoid glycosides, cruciasides C-G, along with two known monoterpenoid glycosides. The structures of these compounds were elucidated by using chemical and spectroscopic analyses, including 1D and 2D NMR, and MS-MS fragmentation. Structures for the ions observed in the MS-MS were proposed, and based on these fragmentation patterns, structures for several of the minor components observed in the molecular network were also proposed. All isolated compounds were tested for cytotoxic, anti-inflammatory, antimicrobial, and α-glucosidase inhibitory properties, but did not display any activity.
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Affiliation(s)
- Xueling Liu
- School of Pharmaceutical Science and Technology, Health Sciences Platform, Tianjin University, Tianjin, 300072, China
| | - Yali Wang
- School of Pharmaceutical Science and Technology, Health Sciences Platform, Tianjin University, Tianjin, 300072, China
| | - Valida Alizade
- Institute of Botany, Azerbaijan National Academy of Sciences, Baku, AZ1102, Azerbaijan
| | - Manana Khutsishvili
- National Herbarium of Georgia, Ilia State University, Tbilisi, 100995, Georgia
| | | | - Robert P Borris
- School of Pharmaceutical Science and Technology, Health Sciences Platform, Tianjin University, Tianjin, 300072, China
| | - Benjamin R Clark
- School of Pharmaceutical Science and Technology, Health Sciences Platform, Tianjin University, Tianjin, 300072, China.
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Liu X, Atha D, Clark BR, Borris RP. Feruloyl sucrose derivatives from the root of Xerophyllum tenax. PHYTOCHEMISTRY 2021; 185:112703. [PMID: 33639582 DOI: 10.1016/j.phytochem.2021.112703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 02/06/2021] [Accepted: 02/09/2021] [Indexed: 06/12/2023]
Abstract
A phytochemical investigation of the roots of Xerophyllum tenax led to the isolation of three undescribed feruloyl sucrose derivatives along with two known feruloyl sucrose derivatives, heloniosides A and B. This is the first report of their occurrence in the genus Xerophyllum and the family Melanthiaceae. The structures of these compounds were elucidated on the basis of chemical and spectroscopic analysis including 1D and 2D NMR and analysis of MS-MS fragmentation.
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Affiliation(s)
- Xueling Liu
- School of Pharmaceutical Science and Technology, Health Sciences Platform, Tianjin University, Tianjin, 300072, China
| | | | - Benjamin R Clark
- School of Pharmaceutical Science and Technology, Health Sciences Platform, Tianjin University, Tianjin, 300072, China
| | - Robert P Borris
- School of Pharmaceutical Science and Technology, Health Sciences Platform, Tianjin University, Tianjin, 300072, China.
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Bacterial Alkyl-4-quinolones: Discovery, Structural Diversity and Biological Properties. Molecules 2020; 25:molecules25235689. [PMID: 33276615 PMCID: PMC7731028 DOI: 10.3390/molecules25235689] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 11/27/2020] [Accepted: 11/27/2020] [Indexed: 11/17/2022] Open
Abstract
The alkyl-4-quinolones (AQs) are a class of metabolites produced primarily by members of the Pseudomonas and Burkholderia genera, consisting of a 4-quinolone core substituted by a range of pendant groups, most commonly at the C-2 position. The history of this class of compounds dates back to the 1940s, when a range of alkylquinolones with notable antibiotic properties were first isolated from Pseudomonas aeruginosa. More recently, it was discovered that an alkylquinolone derivative, the Pseudomonas Quinolone Signal (PQS) plays a key role in bacterial communication and quorum sensing in Pseudomonas aeruginosa. Many of the best-studied examples contain simple hydrocarbon side-chains, but more recent studies have revealed a wide range of structurally diverse examples from multiple bacterial genera, including those with aromatic, isoprenoid, or sulfur-containing side-chains. In addition to their well-known antimicrobial properties, alkylquinolones have been reported with antimalarial, antifungal, antialgal, and antioxidant properties. Here we review the structural diversity and biological activity of these intriguing metabolites.
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