23903-53-9

ethyl 2,5-dimethyl-4-oxo-3H-thieno[5,4-d]pyrimidine-6-carboxylate ethyl 2,5-dimethyl-4-oxo-3H,4H-thieno[2,3-d]pyrimidine-6-carboxylate 2,5-dimethyl-4-oxo-3H-thieno[5,4-d]pyrimidine-6-carboxylic acid ethyl ester 4-keto-2,5-dimethyl-3H-thieno[5,4-d]pyrimidine-6-carboxylic acid ethyl ester 2,5-DIMETHYL-4-OXO-3,4-DIHYDRO-THIENO[2,3-D]PYRIMIDINE-6-CARBOXYLIC ACID ETHYL ESTER Thieno[2,3-d]pyrimidine-6-carboxylic acid, 1,4-dihydro-2,5-dimethyl-4-oxo-, ethyl ester