Aspidoptoids A–D: Four New Diterpenoids from <i>Aspidopterys obcordata</i> Vine
Peng Sun, Dong-Hua Cao, Yi-Dian Xiao and 6 more
Molecules · 2020
doi:10.3390/molecules25030529 (opens in a new tab)
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Abstract
Four new diterpenoids, named aspidoptoids A−D (<b>1</b>−<b>4</b>), together with two known analogues (<b>5</b>−<b>6</b>) were isolated from <i>Aspidopterys obcordata </i>vine. Aspidoptoids A−B (<b>1</b>−<b>2</b>) are the first examples of phenylethylene-bearing 20-nor-diterpenoids of which aspidoptoid B (<b>2</b>) 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 licence: CC BY
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