作者:Antonio G. González、Lucia S. Andres、Angel G. Ravelo、Javier G. Luis、Isabel L. Bazzocchi、Jan West
DOI:10.1016/0031-9422(90)80149-b
日期:1990.1
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.