1979 Volume 27 Issue 9 Pages 2248-2251
Further examination of the petroleum ether extracts of Marsdenia formosana MASAMUNE (Asclepiadaceae) led to the isolation and characterization of a new triterpenoid, marsformosanone (III) together with a known steroidal compound, stigmast-5-en-3β, 7α-diol (I).