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Updated: Aug 11, 2026
High-resolution Tandem Mass Spectrometry for Studying Chemical Constituents of Gynura bicolor DC
Published on: February 2, 2024
[Phenylethanoid glycosides from stem of Chirita longgangensis var. hongyao]
Man-Yuan Wang1, Lan Yang, You-You Tu
1Institute of Chinese Materia Medica, China Academy of Traditional Chinese Medicine, Beijing 100700, China. wangmyjun@yahoo.com.cn
Objective:
To isolate and elucidate the constituents from stem of Chirita longgangensis var. hongyao.
Method:
The constituents were extracted with methanol and isolated by chromatography on silica gel, Sephadex LH-20 and ODS. The structures were determined by NMR and MS spectral analysis.
Result:
Five phenylethanoid glycosides were identified as 3, 4-dihydroxyphenyl alcohol-beta-D-glucopyranoside (1), 3, 4-dihydroxyphenyl alcohol-6-O-caffeoyl--D-glucopyranoside (calceolarioside B) (2), 3, 4-dihydroxyphenyl alcohol-beta-D-glucopyranosyl-(1 --> 3)-6-O-caffeoyl-beta-D-glucopyranoside (plantainoside D) (3), 3, 4-dihydroxyphenyl alcohol-beta-D-glucopyranosyl-(1 --> 3)-4-O-caffeoyl-beta-D-glucopyranoside (plantamajoside) (4), 3, 4-dihydroxyphenyl alcohol-beta-D-glucopyranosyl-(1 --> 3)-6-O-feruloyl-beta-D-glucopyranoside (scroside E) (5), respectively.
Conclusion:
Compounds 3 and 5 were isolated for the first time from the family Gesneriaceae, and compounds 1, 2 and 4 were isolated for the first time from the genus Chirita.