Some hopanes and esgostanes from lichen Parmotrema sancti-angelii (Lynge) Hale (Parmeliaceae)

Abstract

Five known hopane-type triterpenes, zeorin (1), 6α-acetoxyhopane-22-ol (2), leucotylin (3), 16β-acetoxyhopane-6α,22-diol (4), 6α-acetoxyhopane-16β,22-diol (5), along with two esgostane-type sterols, 5α,8α-esgosterol peroxide (6), brassicasterol (7) were isolated from the lichen Parmotrema sancti-angelii (Lynge) Hale. Their chemical structures were elucidated by spectroscopic data analysis and comparison with those reported in the literature. This is the first time these compounds are reported in Parmotrema sancti-angelii (Lynge) Hale.