1,4-Ethano-1H-2-benzopyran-7-carboxamide, 6-amino-3,4,5,8-tetrahydro-4,9-dihydroxy-3-methyl-5,8-dioxo-, (1alpha,3beta,4beta,9R*)- 1,4-Ethano-1H-2-benzopyrancarboxamide, 6(or 7)-amino-3,4,5,8-tetrahydro-4,9-dihydroxy-3-methyl-5,8-dioxo- 6-Amino-3,4,5,8-tetrahydro-4,9-dihydroxy-3-methyl-5,8-dioxo-1,4-ethano-1H-2-benzopyron-7-carboxamide 74639-67-1 75533-14-1 NSC 337587 Sarcinamycin A Sarubicin A U 58,431 U 58431 U-58,431 U-58431