1,3-Dihydroxy-2-methoxymethyl-9,10-anthraquinone fromRennellia ellipticaKorth.

Abstract

The title compound, C16H12O5, common name: lucidin ω-methyl ether, exists as a planar molecule (r.m.s. deviation = 0.04 Å). Within the molecule, the 1-hydroxy group forms a hydrogen bond to the adjacent carbonyl O atom, and the 3-hydroxy group forms a hydrogen bond to the adjacent methoxy O atom. The methoxy O atom is disordered over two positions of equal occupancy.