Chemical Constituents of Hoya paziae Kloppenb

Chemical investigation of the dichloromethane extract of the leaves of Hoya paziae Kloppenb. led to the isolation of a mixture of lupeol (1a), alpha-amyrin (1b), and beta-amyrin (1c) in a 2:3:1 and a mixture of lupeol fatty acid esters (2a), alpha-amyrin fatty acid esters (2b), and beta-amyrin fatty acid esters (2c) in a 3:2:1 ratio. The structures of 1a-2c were identified by comparison of their NMR data with those reported in the literature.