Kansuiphorin-C and -D, cytotoxic diterpenes from Euphorbia kansui

Abstract Two new cytotoxic diterpenes, kansuiphorin-C and -D, have been isolated from Euphorbia kansui . Their structures and stereochemistries have been established from spectral data in conjunction with X-ray crygtallographic analysis of the benzene solvate of kansuiphorin-C.