Synonyms: 4H-cyclopenta[b]thiophene-3-carboxylic acid, 2-[[3-(1,3-dihydro-4-nitro-1,3-dioxo-2H-isoindol-2-yl)-1-oxopropyl]amino]-5,6-dihydro-, ethyl ester;Ethyl 2-{[3-(4-nitro-1,3-dioxo-1,3-dihydro-2H-isoindol-2-yl)propanoyl]amino}-5,6-dihydro-4H-cyclopenta[b]thiophene-3-carboxylate