4-甲基-2-氯嘧啶-5-羧酸乙酯

Ethyl 6-methyl-2-oxo-4-phenyl-1,2,3,4-tetrahydro-5-pyrimidinecarb oxylate

6-甲基-2-氧代-4-噻吩-2-基-1,2,3,4-四氢-嘧啶-5-羧酸乙酯

1,2-dihydro-6-methyl-2-oxo-5-(thiophene-2-carbonyl)pyrimidine