(5-AMINO-1,2-DIHYDRO-3-(4-METHOXYPHENYL)PYRIDO[3,4-D]PYRAZIN-7-YL)CARBAMIC ACID, ETHYL ESTER, HYDROCHLORIDE (25:3) Carbamic acid, [5-amino-1,2-dihydro-3-(4-methoxyphenyl)pyrido[3,4-b]pyrazin-7-yl]-, ethyl ester, hydrochloride (25:3) NSC332890