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Chemical Constituents from the Pericarp of Trewia nudiflora

✍ Scribed by Zhi-Zhi Du; Hong-Ping He; Bin Wu; Yue-Mao Shen; Xiao-Jiang Hao

Publisher
John Wiley and Sons
Year
2004
Tongue
German
Weight
85 KB
Volume
87
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

Three new ent‐atisane diterpenes, i.e., 17‐hydroxy‐ent‐atisan‐19‐oic acid (1), 17‐hydroxy‐ent‐atisan‐19‐oic acid methyl ester (2), and 16__α__,17‐dihydroxy‐ent‐atisan‐19‐al (3), together with five known phenolic compounds, i.e., gallic acid, ethyl gallate, protocatechuic acid, 3,4,4′‐tri‐O‐methylellagic acid, and α‐tocopherol, and two other known compounds, i.e., trans‐cinnamic acid and taraxerone, were isolated from the pericarp of Trewia nudiflora collected in Xishuangbanna, Yunnan Province, China. Their structures were elucidated by spectroscopic analysis including 1D‐ and 2D‐NMR. Trace amounts of maytansinoids were isolated by antifungal‐activity‐guided fractionation and determined by LC‐ESI‐MS analysis; they were prominent antifungal constituents in the pericarp of Trewia nudiflora.

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