Abstract
Three new C-glycosides, calophymembransides D-F (1–3), were isolated from the stems of Calophyllum membranaceum Gardn. et Champ.. The structures were assigned on the basis of spectroscopic data. RXRα transcriptional inhibition and α-glucosidase inhibition assays indicated that all the isolates were inactive.
Acknowledgment
The authors thank Prof. Song-Ji Wei, at Guangxi University of Chinese Medicine, Guangxi province, China for the botanical collection and identification. Thanks are also given to the Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, for measuring the HRESIMS data.