Synonyms: (1aS)-6-(4-Methyl-2-thiazolylamino)-8β-[(aminocarbonyloxy)methyl]-1,1aα,2,8,8a,8bα-hexahydro-8aα-methoxy-5-methylazirino[2',3':3,4]pyrrolo[1,2-a]indole-4,7-dione;(1S,2S,9S,9aR)-6-Methyl-7-(4-methyl-2-thiazolylamino)-9-(carbamoyloxymethyl)-9a-methoxy-1,2-epimino-2,3,9,9a-tetrahydro-1H-pyrrolo[1,2-a]indole-5,8-dione