A New Triterpenoid from Gymnema sylvestre and its Allelopathic Activity
摘要
A new triterpenoid (1) and four known compounds (2–5) were isolated from Gymnema sylvestre. The structure of compound 1 was elucidated as (3β,16β,22α)-22-benzoyloxy-16,23,28,29-tetrahydroxyolean-12-en-3-yl-O-β-D-glucopyranosiduronic acid by spectroscopic data (1H, 13C NMR, HMBC, HSQC, COSY, and NOESY). Additionally, compound 1 presented allelopathic activity on the growth of lettuce at 100 μM.