Ethyl 2-chloro-8-ethyl-7,8-dihydro-5-hydroxypyrido[2,3-d]pyrimidine-6-carboxylate

2-CHLORO-8-ETHYL-5,6,7,8-TETRAHYDRO-5-OXO-PYRIDO(2,3-D)PYRIMIDINE-6-CARBOXYLIC ACID ETHYL ESTER