2-acetyl-pent-4-enoic acid ethyl ester, 1-(4'-nitro-2'-thienyl)ethanone, 2-acetyl-4-nitrothiophene, 3-Nitro-5-acetyl-thiophen, 1-(4-Nitro-[2]thienyl)-aethanon, 4-Pentenoic acid, 2-acetyl-, ethyl ester, 1-(4-nitro-thiophen-2-yl)-ethanone, ethyl 2-allylacetoacetate, 2-Acetyl-4-nitro-thiophen, 2-acetyl-4-pentenoic acid ethyl ester, Ethanone,1-(4-nitro-2-thienyl), ethyl 2-allyl-3-oxobutanoate, rac-ethyl 2-acetylpent-4-enoate