Chuktabularins A-D, four new limonoids with unprecedented carbon skeletons from the stem bark of Chukrasia tabularis |
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| Authors: | Zhang Chuan-Rui Yang Sheng-Ping Liao Shang-Gao Fan Cheng-Qi Wu Yan Yue Jian-Min |
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| Affiliation: | State Key Laboratory of Drug Research, Institute of Materia Medica, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 555 Zuchongzhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, People's Republic of China. |
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| Abstract: | Chuktabularins A-D (1-4), four novel 16-norphragmalin-type limonoids that feature unprecedented skeletons with a biosynthetically extended C2 or C3 unit at C-15 forming a unique 2,7-dioxabicyclo[2.2.1]heptane moiety, were isolated from the stem bark of Chukrasia tabularis. Their structures were elucidated by spectroscopic analysis and computer modeling. The biosynthetic pathway of 1-4 was postulated. |
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