New Depsides from the Lichen Neofuscelia depsidella

Abstract

The new depsides decarboxydivaricatic acid (3), decarboxy-2′-O-methyldivaricatic acid (4), de- carboxynorstenosporic acid (5), decarboxynorimbricaric acid (6), decarboxystenosporic acid (7), decarboxy-2′-O-methylnorimbricaric acid (8), decarboxyanziaic acid (9) and decarboxyperlatolic acid (10), and the novel tridepsides depsidellin A (23), depsidellin B (27) and depsidellin C (29) have been detected in the lichen Neofuscelia depsidella and their structures determined by total synthesis