1. Xylomexicanins K-N: limonoids from the leaves and twigs of Xylocarpus granatum.
- Author
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Li, Shao-Jing, Zhao, Li-Kang, Chen, Jin-Jun, Zhou, Chun-Hua, Huang, Xin-Li, Wu, Yi-Bing, Sauriol, Françoise, Gu, Yu-Cheng, and Kiyota, Hiromasa
- Subjects
TWIGS ,LIMONOIDS ,MASS spectrometry - Abstract
Six new compounds, xylomexicanins K-N (1–4), granasteroid (5) and 5-methoxy-2-pentylbenzofuran-7-ol (6), along with nine known compounds were isolated from the leaves and twigs of Xylocarpus granatum. Among them, 1 was a biogenetic precursor of 1,8,9-phragmalin limonoid, and 4 represent the first example of degraded A-ring limonoid. The structures of them were elucidated on the basis of one- and two-dimensional NMR spectroscopic data (including
1 H,13 C-NMR, DEPT,1 H-1 H COSY, HSQC, HMBC, and NOESY) and confirmed by high-resolution mass spectrometry. [ABSTRACT FROM AUTHOR]- Published
- 2022
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