The molecule is a sterigmatocystin whose skeleton comprises a xanthone ring system ortho-fused to a dihydrofuranofuran moiety. It has a role as a metabolite and a carcinogenic agent. It is a member of sterigmatocystins and a cyclic acetal.
(3S,7R)-15-hydroxy-11-methoxy-6,8,20-trioxapentacyclo[10.8.0.02,9.03,7.014,19]icosa-1,9,11,14,16,18-hexaen-13-one