The HMBC correlations (Fig. 2) from hydroxymethyl protons (δH4.65, H-11) to C-2, C-3 and C-4 indicated that a hydroxymethyl was attached to C-3 of the anthrone ring
The HMBC correlations (Fig. 2)from hydroxymethyl protons (δH4.65, H-11) to C-2, C-3 andC-4 indicated that a hydroxymethyl was attached to C-3 ofthe anthrone ring