期刊
TETRAHEDRON
卷 63, 期 34, 页码 8234-8241出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2007.05.107
关键词
Turraea pubescens; limonoids; turrapubesic acids; turrapubesins; absolute stereochemistry
Eight new ring B-seco limonoids, turrapubesic acids A-C (1-3) and turrapubesins C-G (4-8), along with turraflorin E and iso-azadironolide were isolated from the twigs and leaves of Turraea pubescens. Turrapubesic acids A-C (1-3) are a group of ring B-seco limonoid 17-carboxylic acids with a new C-23 skeleton, and turrapubesin C (4) incorporates an unprecedented 1,30-oxygen bridge. The structures including absolute stereochemistry of 1-8 were established on the basis of extensive NMR spectroscopic analysis and CD study. The cytotoxicity of the isolates against the P-388 and A-549 cells was evaluated. (c) 2007 Elsevier Ltd. All rights reserved.
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