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Identification of C‐glycosyl flavones and quality assessment in Dendrobium nobile
Author(s) -
Wang Yawen,
Liao Xian,
Zhou Chujuan,
Hu Li,
Wei Gang,
Huang Yuechun,
Lei Zhouxi,
Ren Zhiyao,
Liu Zhixia,
Liu Zhihua
Publication year - 2021
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/rcm.9012
Subject(s) - flavones , chemistry , glycosyl , chromatography , stereochemistry
Rationale Flavones are significant indicators of quality in traditional Chinese medicines (TCMs) and thus play a significant role in the quality control of TCMs in the pharmaceutical industry. Most flavones in Dendrobium nobile Lindl, a TCM with a long cultivation history and rich sources, have not been identified. This study was aimed at identifying the flavones in D. nobile from various habitats. Methods High‐performance liquid chromatography (HPLC) coupled with diode‐array detection and HPLC multiple‐stage tandem mass spectrometry was used to identify the chemical constituents of D. nobile from various habitats, and a method was established to determine the content of vicenin II, violanthin and isoviolanthin. Hierarchical cluster analysis, principal component analysis and orthogonal partial least‐squares discriminant analysis were used to analyze the variations among 26 batches from different habitats. Results A total of 33 flavones were tentatively identified. Twenty‐five flavones, previously undescribed in D. nobile , were acylated by p ‐coumaroyl, feruloyl, sinapoyl or 3‐hydroxy‐3‐methylglutaryl. The D. nobile habitats were distinguished by significant differences in their flavone content. The C‐glycosyl flavones were demonstrated to be characteristic compounds for evaluating D. nobile from various habitats. In particular, flavones acylated with 3‐hydroxy‐3‐methylglutaryl were specific compounds that were only detected in samples from Yunnan. Conclusions The results of this study could be used to improve the quality control of D. nobile and could provide references for the identification of acylated C‐glycosyl flavones in other natural products.