ethyl 2-nitro-1,3-thiazole-4-carboxylate

ethyl 5-sulfanyl-1,3-thiazole-4-carboxylate

ethyl 2-amino-5-isothiocyanato-1,3-thiazole-4-carboxylate

ethyl 5-[(4-methoxyphenyl)methylsulfanyl]-1,3-thiazole-4-carboxylate