Synonyms: 5H-thiazolo[3,2-a]pyrimidine-6-carboxylic acid, 2,3-dihydro-7-methyl-5-(4-methylphenyl)-2-[(4-methylphenyl)methylene]-3-oxo-, ethyl ester, (2Z)-;Ethyl (2Z)-7-methyl-2-(4-methylbenzylidene)-5-(4-methylphenyl)-3-oxo-2,3-dihydro-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate