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Updated: Mar 18, 2026

Preparation of Gynura bicolor DC samples for High-Resolution Tandem Mass Spectrometry
Published on: February 2, 2024
[Chemical Constituents of Cynanchum auriculatum]
Objective:
To study the chemical constituents of Cynanchum auriculatum.
Methods:
Nine compounds were isolated by silica gel, RP-18 column chromatography and Sephadex LH20.
Results:
Nine compounds were isolated from the ethanol extract of Cynanchum auriculatum. Their structures were determined as sarcosin-3-O-β-cymaropyranoside (1), cynotophylloside B (2), clemaphenol A (3), deacetylmetaplexigenin (4), methyl-2,6-dideoxy-3-O-methyl-β-D-arabino-hexopyranosyl- (1 --> 4) -6-deoxy-3-O-methyl-α-L-ribo-hexopyranoside (5), trans-p-hydroxy cinnamic methyl ester (6), cyclo(D-Pro-D-Leu) (7), 3α-hydroxy-5α ,6α-epoxy-7-megastigmen9-one (8) and ferulic acid methyl ester (9) on the basis of spectral analysis.
Conclusion:
Compounds 3, 5 and 6 - 9 are isolated from Cynanchum auriculatum for the first time.
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