123044-09-7
2-(2-ethoxycarbonylethyl)thio-6-methyl-4-phenyl-1,4-dihydropyrimidine-5-carboxylic acid ethyl ester
→
123044-04-2
2,7-dimethyl-3-oxo-5-phenyl-2,3-dihydro-5H-thiazolo[3,2-a]pyrimidine-6-carboxylic acid ethyl ester