5-benzyloxy-2-methylanthra<1,2-b>furan-6,11-dione
(4'R,5'R)-1-acetoxy-4-benzyloxy-2-(4',5'-dimethyl-1',3'-dioxolan-2'-yl)anthraquinone
(4'R,5'R)-4-benzyloxy-2-(4',5'-dimethyl-1',3'-dioxolan-2'-yl)-1-methoxyanthraquinone
(4'R,5'R)-4-benzyloxy-2-(4',5'-dimethyl-1',3'-dioxolan-2'-yl)-1-hydroxyanthraquinone
4-benzyloxy-2-dimethoxymethyl-1-hydroxyanthraquinone