Synonyms: 6H-Dibenz[b,d]oxocin-3,7,10,11-tetrol,7,8-dihydro-7-(3,9,10-trihydroxy-6H,7H-6a,11b-(epoxymethanoxy)benz[b]indeno[1,2-d]pyran-13-yl)-,[6aR-[6aa,11ba,13S*(R*)]]-;6H,7H-6a,11b-(Epoxymethanoxy)benz[b]indeno[1,2-d]pyran,6H-dibenz[b,d]oxocin-3,7,10,11-tetrol deriv.; Protosappanin E 1