ethyl 5-acetamidothiophene-2-carboxylate

ethyl 2-propan-2-ylsulfanylacetate

ethyl 4-hydroxyimino-8-methylnon-7-enoate

ethyl 3-(N-hydroxy-C-methylcarbonimidoyl)-6-methylhept-5-enoate

ethyl 4-(4-methoxyphenyl)but-3-enoate