Fern Constituents : Triterpenoids Isolated from the Leaves of Adiantum monochlamys. Filicenol A, Filicenol B, Isoadiantol B, Hakonanediol and Epihakonanediol

Abstract

Five new triterpenoids, filicenol A (1), filicenol B (2), isoadiantol B (3), hakonanediol (4) and epihakonanediol (5), were isolated from the leaves of Adiantum monochlamys EATON, and their structures were elucidated on the basis of spectral data and chemical correlations with known compounds. Additional data are presented for previously reported compounds (6-21) from the same source.