Pigments of Fungi. LVI. Dermocanarin 7, a New Naphthalene– Dihydroanthracenone–Oxanthrone Trimer from an Australian Dermocybe Toadstool

Abstract

Dermocanarin 7 (3), a unique combination of a macrocyclic lactone of the dermocanarin class with an oxanthrone, is isolated from an indigenous Australian toadstool belonging to the genus Dermocybe. The structure of dermocanarin 7 (3) is determined mainly from spectroscopic data, while the absolute stereochemistry at the three chiral centres and at the chiral axis follows from the c.d. spectrum of (3) and the results of NOESY and other n.m.r. experiments.