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Gouilleux B, Moussallieh FM, Lesot P. Potential and performance of anisotropic 19F NMR for the enantiomeric analysis of fluorinated chiral active pharmaceutical ingredients. Analyst 2024; 149:3204-3213. [PMID: 38655746 DOI: 10.1039/d4an00237g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
Controlling the enantiomeric purity of chiral drugs is of paramount importance in pharmaceutical chemistry. Isotropic 1H NMR spectroscopy involving chiral agents is a widely used method for discriminating enantiomers and quantifying their relative proportions. However, the relatively weak spectral separation of enantiomers (1H Δδiso(R, S)) in frequency units at low and moderate magnetic fields, as well as the lack of versatility of a majority of those agents with respect to different chemical functions, may limit the general use of this approach. In this article, we investigate the analytical potential of 19F NMR in anisotropic chiral media for the enantiomeric analysis of fluorinated active pharmaceutical ingredients (API) via two residual anisotropic NMR interactions: the chemical shift anisotropy (19F-RCSA) and dipolar coupling ((19F-19F)-RDC). Lyotropic chiral liquid crystals (CLC) based on poly-γ-benzyl-L-glutamate (PBLG) show an interesting versatility and adaptability to enantiodiscrimination as illustrated for two chiral drugs, Flurbiprofen® (FLU) and Efavirenz® (EFA), which have very different chemical functions. The approach has been tested on a routine 300 MHz NMR spectrometer equipped with a standard probe (5 mm BBFO probe) in a high-throughput context (i.e., ≈10 s of NMR experiments) while the performance for enantiomeric excess (ee) measurement is evaluated in terms of trueness and precision. The limits of detection (LOD) determined were 0.17 and 0.16 μmol ml-1 for FLU and EFA, respectively, allow working in dilute conditions even with such a short experimental duration. The enantiodiscrimination capabilities are also discussed with respect to experimental features such as CLC composition and temperature.
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Affiliation(s)
- Boris Gouilleux
- Université Paris-Saclay, UFR d'Orsay, RMN en Milieu Orienté, ICMMO, UMR CNRS 8182, Bât. HM1, 17-19, Avenue des Sciences, 91400, Orsay, France
| | - François-Marie Moussallieh
- Université Paris-Saclay, UFR d'Orsay, RMN en Milieu Orienté, ICMMO, UMR CNRS 8182, Bât. HM1, 17-19, Avenue des Sciences, 91400, Orsay, France
| | - Philippe Lesot
- Université Paris-Saclay, UFR d'Orsay, RMN en Milieu Orienté, ICMMO, UMR CNRS 8182, Bât. HM1, 17-19, Avenue des Sciences, 91400, Orsay, France
- Centre National de la Recherche Scientifique (CNRS), 3, Rue Michel Ange, F-75016 Paris, France.
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Chen Y, Wang Y, Yan J, Xu Y, Liu Y, Ma S, Wu X. Quantification of sesquiterpene pyridine alkaloids from genus Tripterygium by band-selective HSQC NMR. Anal Chim Acta 2023; 1274:341568. [PMID: 37455080 DOI: 10.1016/j.aca.2023.341568] [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: 03/10/2023] [Revised: 06/26/2023] [Accepted: 06/27/2023] [Indexed: 07/18/2023]
Abstract
Sesquiterpene pyridine alkaloids (SPAs) are bioactive analogues derived from the genus Tripterygium and have anti-inflammatory and anti-rheumatic properties. Attributed to the similar sesquiterpene structures, the total SPAs showed severe peak overlap in 1D NMR and HPLC, leading to difficulties in identification and quantification. Interestingly, the application of band-selective HSQC NMR that specifically excited the region corresponding to the H-3 of SPAs prompted a signal separation of the total SPAs. Based on the high resolution, 23 SPAs were identified from the band-selective HSQC spectrum. The coupling constants (JCH, JHH) and relaxation times (T1, T2) of SPAs were measured, and it was found that they caused less than 1% attenuation of the HSQC signals, so the HSQC signals of SPAs had almost uniform responses. The concentrations of 23 SPAs were determined by standard curve method, using wilforgine as the calibration. In addition, we extended the pulse length-based concentration determination (PULCON) as a more efficient external standard method to the band-selective HSQC spectrum, and the results showed that the concentrations of alkaloids determined by PULCON were consistent with those measured by standard curve method. The developed quantification approach was validated according to the <761> of United States Pharmacopoeia (USP), demonstrating that the established band-selective HSQC approach is reliable for the rapid quantification of analogues in botanical extracts.
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Affiliation(s)
- Youwen Chen
- National Institutes for Food and Drug Control, Beijing, 102629, PR China; School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, 100102, PR China
| | - Yadan Wang
- National Institutes for Food and Drug Control, Beijing, 102629, PR China
| | - Jiangong Yan
- National Institutes for Food and Drug Control, Beijing, 102629, PR China
| | - Yiwen Xu
- National Institutes for Food and Drug Control, Beijing, 102629, PR China
| | - Yuanyan Liu
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, 100102, PR China
| | - Shuangcheng Ma
- National Institutes for Food and Drug Control, Beijing, 102629, PR China
| | - Xianfu Wu
- National Institutes for Food and Drug Control, Beijing, 102629, PR China.
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Guo C, Dong J, Deng L, Cheng K, Xu Y, Zhu H, Deng A, Zhou X, Qin H, Wang Y. Application of Band-Selective HSQC NMR in Species Discrimination and Adulteration Identification of Panax Linn. Molecules 2023; 28:molecules28114332. [PMID: 37298809 DOI: 10.3390/molecules28114332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 05/13/2023] [Accepted: 05/23/2023] [Indexed: 06/12/2023] Open
Abstract
The quality of Panax Linn products available in the market is threatened by adulteration with different Panax species, such as Panax quinquefolium (PQ), Panax ginseng (PG), and Panax notoginseng (PN). In this paper, we established a 2D band-selective heteronuclear single quantum coherence (bs-HSQC) NMR method to discriminate species and detect adulteration of Panax Linn. The method involves selective excitation of the anomeric carbon resonance region of saponins and non-uniform sampling (NUS) to obtain high-resolution spectra in less than 10 min. The combined strategy overcomes the signal overlap limitation in 1H NMR and the long acquisition time in traditional HSQC. The present results showed that twelve well-separated resonance peaks can be assigned in the bs-HSQC spectra, which are of high resolution, good repeatability, and precision. Notably, the identification accuracy of species was found to be 100% for all tests conducted in the present study. Furthermore, in combination with multivariate statistical methods, the proposed method can effectively determine the composition proportion of adulterants (from 10% to 90%). Based on the PLS-DA models, the identification accuracy was greater than 80% when composition proportion of adulterants was 10%. Thus, the proposed method may provide a fast, practical, and effective analysis technique for food quality control or authenticity identification.
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Affiliation(s)
- Congcong Guo
- Institute of Meteria Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China
| | - Jiyang Dong
- Department of Electronic Science, Fujian Provincial Key Laboratory for Plasma and Magnetic Resonance, Xiamen University, Xiamen 361005, China
| | - Lingli Deng
- Department of Information Engineering, East China University of Technology, Nanchang 330013, China
| | - Kiankai Cheng
- Innovation Centre in Agritechnology, Universiti Teknologi Malaysia, Pagoh 84600, Johor, Malaysia
| | - Yue Xu
- Institute of Meteria Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China
| | - Haowen Zhu
- Institute of Meteria Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China
| | - Anjun Deng
- Institute of Meteria Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China
| | - Xia Zhou
- Institute of Meteria Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China
| | - Hailin Qin
- Institute of Meteria Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China
| | - Yinghong Wang
- Institute of Meteria Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China
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Terahertz spectroscopy for quantitatively elucidating the crystal transformation of chiral histidine enantiomers to racemic compounds. Food Chem 2023; 406:135043. [PMID: 36450194 DOI: 10.1016/j.foodchem.2022.135043] [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: 08/15/2022] [Revised: 11/04/2022] [Accepted: 11/20/2022] [Indexed: 11/26/2022]
Abstract
d-Histidine (d-His), l-Histidine (l-His), and their racemic compound dl-Histidine (dl-His) have different stereo chirality, making them intrinsic diverse functionalities to the living system. Identifying the configuration and crystal structures of enantiomers and the racemic compound is always the foremost requirement in processing protein foods. Although these features can be analyzed by spectroscopic technologies individually, it remains challenging to incorporate these complex methods into a facile analytical strategy. Herein, we propose a terahertz spectroscopy with solid-state density functional theory to both distinguish the configurational difference and quantify the crystal transformation from l-His and d-His to dl-His. By comparison with X-ray diffraction analysis, the validity of the crystal transformation evaluation based on terahertz spectroscopy is verified. A normalized fitting line regarding the terahertz absorption frequency and intensity is calculated to quantitatively elucidate the crystal transformation from enantiomers to dl-His. Our findings provide a new analytical approach to the research on food chemistry.
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Tian D, Huang L, Zhang Z, Tian Z, Ge S, Wang C, Hu Y, Wang Y, Yang J. A novel approach for quantitative determination of cellulose content in tobacco via 2D HSQC NMR spectroscopy. Carbohydr Res 2023; 526:108790. [PMID: 36933368 DOI: 10.1016/j.carres.2023.108790] [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: 01/05/2023] [Revised: 03/06/2023] [Accepted: 03/11/2023] [Indexed: 03/14/2023]
Abstract
Cellulose is an important component of tobacco (Nicotiana tabacum L.) cell walls, which can be precursors for many harmful compounds in smoke. Traditional cellulose content analysis methods involve sequential extraction and separation steps, which are time-consuming and environmentally unfriendly. In this study, a novel method was first introduced to analyze cellulose content in tobacco via two-dimensional heteronuclear single quantum coherence (2D HSQC) NMR spectroscopy. The method was based on derivatization approach to allow the dissolution of insoluble polysaccharide fractions of tobacco cell walls in DMSO‑d6/pyridine-d5 (4:1 v/v) for NMR analysis. The NMR results suggested that besides the main NMR signals of cellulose, partial signals of hemicellulose including mannopyranose, arabinofuranose, and galactopyranose units could also be identified. In addition, the utilization of relaxation reagents has proved to be an effective way to improve the sensitivity of 2D NMR spectroscopy, which was beneficial for quantification of biological samples with limited quantities. To overcome the limitations of quantification using 2D NMR, the calibration curve of cellulose with 1,3,5-trimethoxybenzene as internal reference was constructed and thus the accurate measurement of cellulose in tobacco was achieved. Compared with the chemical method, the interesting method was simple, reliable, and environmentally friendly, which provided a new insight for quantitative determination and structure analysis of plant macromolecules in complex samples.
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Affiliation(s)
- Dayu Tian
- Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, 230026, People's Republic of China
| | - Lan Huang
- Technology Center, China Tobacco Auhui Industrial Co., Ltd., No.9 Tianda Road, Hefei, 230088, People's Republic of China; Key Laboratory of Tobacco Chemistry in Anhui Province, China Tobacco Auhui Industrial Co., Ltd., No.9 Tianda Road, Hefei, 230088, People's Republic of China.
| | - Zhao Zhang
- Technology Center, China Tobacco Auhui Industrial Co., Ltd., No.9 Tianda Road, Hefei, 230088, People's Republic of China; Key Laboratory of Tobacco Chemistry in Anhui Province, China Tobacco Auhui Industrial Co., Ltd., No.9 Tianda Road, Hefei, 230088, People's Republic of China
| | - Zhenfeng Tian
- Technology Center, China Tobacco Auhui Industrial Co., Ltd., No.9 Tianda Road, Hefei, 230088, People's Republic of China; Key Laboratory of Tobacco Chemistry in Anhui Province, China Tobacco Auhui Industrial Co., Ltd., No.9 Tianda Road, Hefei, 230088, People's Republic of China
| | - Shaolin Ge
- Technology Center, China Tobacco Auhui Industrial Co., Ltd., No.9 Tianda Road, Hefei, 230088, People's Republic of China; Key Laboratory of Tobacco Chemistry in Anhui Province, China Tobacco Auhui Industrial Co., Ltd., No.9 Tianda Road, Hefei, 230088, People's Republic of China
| | - Chenghui Wang
- Technology Center, China Tobacco Auhui Industrial Co., Ltd., No.9 Tianda Road, Hefei, 230088, People's Republic of China; Key Laboratory of Tobacco Chemistry in Anhui Province, China Tobacco Auhui Industrial Co., Ltd., No.9 Tianda Road, Hefei, 230088, People's Republic of China
| | - Yonghua Hu
- Technology Center, China Tobacco Auhui Industrial Co., Ltd., No.9 Tianda Road, Hefei, 230088, People's Republic of China; Key Laboratory of Tobacco Chemistry in Anhui Province, China Tobacco Auhui Industrial Co., Ltd., No.9 Tianda Road, Hefei, 230088, People's Republic of China
| | - Ying Wang
- Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, 230026, People's Republic of China
| | - Jun Yang
- Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, 230026, People's Republic of China; Key Laboratory of Tobacco Chemistry in Anhui Province, China Tobacco Auhui Industrial Co., Ltd., No.9 Tianda Road, Hefei, 230088, People's Republic of China.
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Pan Y, Han Z, Chen S, Wei K, Wei X. Metallic nanoclusters: From synthetic challenges to applications of their unique properties in food contamination detection. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Wang T, Fan L, Wang M, Zhou J, Yang M, Liu Q. Determination of Polyunsaturated and Omega-3 Fatty Acids in Vegetable Oils and Animal Fats by the Double-Quantum Filtered Correlation Spectroscopy (DQF-COSY). Microchem J 2022. [DOI: 10.1016/j.microc.2022.108127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Wang T, Zhao Y, Wang M. Organic Selenium Compounds Determination in the Complex Matrix by the 1H-77Se HMBC Method. Microchem J 2022. [DOI: 10.1016/j.microc.2022.108032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/07/2022]
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Li F, Wang M, Zhou J, Yang M, Wang T. Cyclodextrin-derivatized hybrid nanocomposites as novel magnetic solid-phase extraction adsorbent for preconcentration of trace fluoroquinolones from water samples coupled with HPLC-MS/MS determination. Microchem J 2021. [DOI: 10.1016/j.microc.2021.105955] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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Kuhn LT, Motiram‐Corral K, Athersuch TJ, Parella T, Pérez‐Trujillo M. Simultaner enantiospezifischer Nachweis mehrerer Verbindungen in Mischungen mittels NMR‐Spektroskopie. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202011727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Lars T. Kuhn
- Institut für Physikalische Chemie Albert-Ludwigs-Universität Freiburg Albertstraße 21 79104 Freiburg i. Br. Deutschland
| | - Kumar Motiram‐Corral
- Servei de Ressonància Magnètica Nuclear Facultat de Ciències i Biociències Universitat Autònoma de Barcelona 08193 Cerdanyola del Vallès Katalonien Spanien
| | - Toby J. Athersuch
- Division of Systems Medicine Department of Metabolism, Digestion and Reproduction Imperial College London South Kensington London UK
| | - Teodor Parella
- Servei de Ressonància Magnètica Nuclear Facultat de Ciències i Biociències Universitat Autònoma de Barcelona 08193 Cerdanyola del Vallès Katalonien Spanien
| | - Míriam Pérez‐Trujillo
- Servei de Ressonància Magnètica Nuclear Facultat de Ciències i Biociències Universitat Autònoma de Barcelona 08193 Cerdanyola del Vallès Katalonien Spanien
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Kuhn LT, Motiram-Corral K, Athersuch TJ, Parella T, Pérez-Trujillo M. Simultaneous Enantiospecific Detection of Multiple Compounds in Mixtures using NMR Spectroscopy. Angew Chem Int Ed Engl 2020; 59:23615-23619. [PMID: 32959941 DOI: 10.1002/anie.202011727] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Indexed: 01/21/2023]
Abstract
Chirality plays a fundamental role in nature, but its detection and quantification still face many limitations. To date, the enantiospecific analysis of mixtures necessarily requires prior separation of the individual components. The simultaneous enantiospecific detection of multiple chiral molecules in a mixture represents a major challenge, which would lead to a significantly better understanding of the underlying biological processes; for example, via enantiospecifically analysing metabolites in their native environment. Here, we report on the first in situ enantiospecific detection of a thirty-nine-component mixture. As a proof of concept, eighteen essential amino acids at physiological concentrations were simultaneously enantiospecifically detected using NMR spectroscopy and a chiral solvating agent. This work represents a first step towards the simultaneous multicomponent enantiospecific analysis of complex mixtures, a capability that will have substantial impact on metabolism studies, metabolic phenotyping, chemical reaction monitoring, and many other fields where complex mixtures containing chiral molecules require efficient characterisation.
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Affiliation(s)
- Lars T Kuhn
- Institut für Physikalische Chemie, Albert-Ludwigs-Universität Freiburg, Albertstraße 21, 79104, Freiburg i. Br., Germany
| | - Kumar Motiram-Corral
- Servei de Ressonància Magnètica Nuclear, Facultat de Ciències i Biociències, Universitat Autònoma de Barcelona, 08193, Cerdanyola del Vallès, Catalonia, Spain
| | - Toby J Athersuch
- Division of Systems Medicine, Department of Metabolism, Digestion and Reproduction, Imperial College London, South Kensington, London, UK
| | - Teodor Parella
- Servei de Ressonància Magnètica Nuclear, Facultat de Ciències i Biociències, Universitat Autònoma de Barcelona, 08193, Cerdanyola del Vallès, Catalonia, Spain
| | - Míriam Pérez-Trujillo
- Servei de Ressonància Magnètica Nuclear, Facultat de Ciències i Biociències, Universitat Autònoma de Barcelona, 08193, Cerdanyola del Vallès, Catalonia, Spain
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