3-methyl-5-aminothiazole
4-phenyl-5-ethoxycarbonyl-2,6-dimethyl-3-thiocarbamoyl-1,4-dihydropyridine
2-(2-aminopropenylidene)-6-phenyl-1,3-thiazin-4-one
2-(2-aminopropenylidene)-5-carboxymethylenethiazolin-4-one
2-(2-aminopropen-1-yl)-4-methyl-5-ethoxycarbonyl-thiazole