Three new cassane diterpenes from the seeds of Caesalpinia minax Hance

Abstract

Three new cassane-diterpene-lactones, methyl 1α,7β-diacetoxy-5α,12α-dihydroxy-cass-13(15)-en-16,12-olide-17β-carboxylate (1), methyl 7β-acetoxy-1α,5α,12α-trihydroxy-cass-13(15)-en-16,12-olide-17β-carboxylate (2), and 12α-ethoxyl-1α,6α,7β-triacetoxy-5α,14β-dihydroxy-cass-13(15)-en-16,12-olide (3), were isolated from the seeds of Caesalpinia minax Hance. Their structures were established on the basis of HR-ESI-MS, 1D and 2D NMR spectral analysis.

Keywords:

• Caesalpinia minax Hance
• Fabaceae
• cassane diterpenes

Acknowledgements

We thank Mrs Wen Li, Mr Yi Sha and Mr Weiming Cheng of the Analytical Centers of the Shenyang Pharmaceutical University for recording NMR spectra and HR-ESI-MS. This work was supported by the Natural Science Foundation Project of Heilongjiang Province (No. D200947).