Triterpenes and sterols from Hoya diversifolia Blume.
Chemical investigation of the dichloromethane extracts of Hoya diversifolia Blume led to the isolation of b amyrin cinnamate (1) squalene (2) b sitosterol (3) a mixture of b amyrin (4a) a amyrin (4b) and lupeol (4c) in a 4:2:1 ratio and saturated hydrocarbons from the leaves; and 2, taraxerol (5) lupeol cinnamate (6) and a mixture of 3 and stigmasterol (7) in a 2:1 ratio from the stems. The structures of 1 7 were identified by comparison of their NMR data with those reported in the literature.