Abstract Two new triterpenes, 3-keto-13(28)-epoxy-ursan-11-ene and 3,11-dioxo-ursan-12-ene and, for the first time naturally occurring, 3β-hydroxy-13(28)-epoxy-ursan-11-ene were isolated and identified by chemical and spectroscopic means. Also isolated were other known triterpenes and abietatriene diterpenes.
摘要 两种新的三萜,3-keto-13(28)-epoxy-ursan-11-ene 和 3,11-dioxo-ursan-12-ene 以及首次天然存在的 3β-hydroxy-13(28) -epoxy-ursan-11-ene通过
化学和光谱方法被分离和鉴定。还分离了其他已知的三萜和
松香三烯二萜。