Cassane- and Norcassane-Type Diterpenes of Caesalpinia crista from Myanmar

摘要: From the CH(2)Cl(2) extract of seed kernels Caesalpinia crista from Myanmar, five new cassane-type diterpenes, caesalpinins MA-ME (1-5), and three norcassane-type norcaesalpinins MA-MC (6-8), have been isolated, together with 12 known 14(17)-dehydrocaesalmin F, caesaldekarin e, caesalmin B, C, E, 2-acetoxy-3-deacetoxycaesaldekarin 2-acetoxycaesaldekarin caesalpinin 7-acetoxybonducellpin norcaesalpinin 6-acetoxy-3-deacetoxycaesaldekarin e. The structures isolated compounds were elucidated by analysis their spectroscopic data.