Ethyl 2-amino-4-(4-chlorophenyl)thiazole-5-carboxylate 4-phenyl-1,3-thiazole Thiazole-5-carboxylic acid Ethyl 2-amino-4-methylthiazole-5-carboxylate Ethyl thiazole-5-carboxylate 2-Amino-4-methylthiazole ETHYL 2-AMINO-4-(4-BROMOPHENYL)THIAZOLE-5-CARBOXYLATE ETHYL 2-AMINO-4-P-TOLYLTHIAZOLE-5-CARBOXYLATE ETHYL 2-AMINO-5-PHENYL-4-THIAZOLECARBOXYLATE