Synonyms: 7,9-dimethyl-3,4-dihydropyrido[3',2':4,5]thieno[3,2-d]pyrimidin-4-one;7,9-Dimethylpyrido[3',2':4,5]thieno[3,2-d]pyrimidin-4(1H)-one;7,9-Dimethylpyrido[3',2':4,5]thieno[3,2-d]pyrimidin-4(3H)-one;pyrido[3',2':4,5]thieno[3,2-d]pyrimidin-4(1H)-one, 7,9-dimethyl-;Pyrido[3',2':4,5]thieno[3,2-d]pyrimidin-4(3H)-one, 7,9-dimethyl-;Pyrido[3',2':4,5]thieno[3,2-d]pyrimidin-4-ol, 7,9-dimethyl-