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5. Aspidoptoids A–D: Four New Diterpenoids from Aspidopterys obcordata Vine.

Author

Sun, Peng, Cao, Dong-Hua, Xiao, Yi-Dian, Zhang, Zong-Yi, Wang, Jia-Nan, Shi, Xiao-Cui, Xiao, Chun-Fen, Hu, Hua-Bin, and Xu, You-Kai

Subjects
DITERPENES, CIRCULAR dichroism, CLIMBING plants, NITRIC oxide
Abstract

Four new diterpenoids, named aspidoptoids A–D (1–4), together with two known analogues (5–6) were isolated from Aspidopterys obcordata vine. Aspidoptoids A–B (1–2) are the first examples of phenylethylene-bearing 20-nor-diterpenoids of which aspidoptoid B (2) possesses a rare 3,10-oxybridge. Their structures and absolute configuration were determined by extensive spectroscopic analyses (IR, HRESIMS, 1D and 2D NMR) and electronic circular dichroism (ECD) calculation. In addition, all the isolates were evaluated for their cytotoxic activities and inhibitory effects on the nitric oxide (NO) production. [ABSTRACT FROM AUTHOR]

Published
2020
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