1665-57-2 2-Naphthacenecarboxamide, 1,4,4a,5,12,12a-hexahydro-4-(dimethylamino)-1,12-dioxo-6-methyl-3,10,11,12a-tetrahydroxy-, 4-epimer 4-Epianhydrotetracycline 4-epi-Anhydrotetracycline 4907-76-0 7518-17-4 Epianhydrotetracycline