Synonyms: ;tert-butyl 2-methyl-4-oxo-3,5,7,8-tetrahydropyrido[4,3-d]pyrimidine-6-carboxylate;4-HYDROXY-2-METHYL-7,8-DIHYDRO-5H-PYRIDO[4,3-D]PYRIMIDINE-6-CARBOXYLIC ACID TERT-BUTYL ESTER;tert-Butyl 4-hydroxy-2-methyl-7,8-dihydropyrido[4,3-d]pyrimidine-6(5H)-carboxylate