Four new cassane diterpenes from the seeds of Caesalpinia minax
2013
Zhao, Peng | Chen, Hongqiang | Wang, Hao | Xu, Jing | Wang, Meicheng | Wang, Yuli | Jin, Da-Qing | Guo, Yuanqiang
In our survey on the chemical composition of traditional Chinese medicines to further elucidate their chemical substances for the treatment of diseases, we investigated the chemical constituents of the seeds of plants Caesalpinia minax. The investigation led to the isolation and identification of four new cassane diterpenes, caesalpines A–D (1–4). Their structures were elucidated on the basis of extensive 1D and 2D NMR (COSY, HMQC, HMBC, and NOESY) and mass (ESIMS and HR-ESIMS) spectroscopic data analyses. The phytochemical results imply that cassane diterpenes are maybe regarded as the characteristic constituents of C. minax.
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