OBJECTIVE
Coroglaucigenin (CGN), a natural product isolated from Calotropis gigantean by our research group, has been identified as a potential anti-cancer agent. However, the molecular mechanisms involved remain poorly understood.
METHODS
Cell viability and cell proliferation were detected by MTT
A new cardenolide, 12beta,14beta-dihydroxy-3beta,19-epoxy-3alpha-methoxy-5alpha-card-20(22)-enolide (6), and a new doubly linked cardenolide glycoside, 12beta-hydroxycalotropin (13), together with eleven known compounds, coroglaucigenin (1), 12beta-hydroxycoroglaucigenin (2), calotropagenin (3),