Trichilin B, a novel limonoid with highly rearranged ring system from Trichilia connaroides |
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| Authors: | Zhao-Liang Geng Xin Fang Qiang Zhang Yue-Mao Shen |
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| Institution: | a State Key Laboratory of Phytochemistry and Plant Resources in West of China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, PR China
b Graduated School of Chinese Academy of Sciences, Beijing 100039, PR China |
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| Abstract: | Trichilin B (2), a limonoid having an unprecedented highly rearranged ring system, along with biosynthetically correlated trichilin A (1), was isolated from Trichilia connaroides. The structures were elucidated by spectroscopic analysis. Compound 2 features a unique 9,17-oxygen bridge, while two unprecedented δ-lactone rings fused to rings A and B at C-5, C-9 and ring C at C-8, C-14. Their cytotoxic activities were also evaluated. |
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