Isolation and characterisation of two novel triterpenes from Adiantum venustum

摘要

The structures of two novel triterpenes, adiantutirucallene B and adiantulanostene,isolated from the aerial parts of Adiantum venustum, have been established as tirucall-8, 22-cyclic-24(25)-ene and 13, 14-seco-8,22-cyclic-lanost-5(6), 24(25)-diene, respectivley on the basis of spectral analyses and chemical reactions.