(5-Amino-1,2-dihydro-2-methyl-3-phenylpyrido(3,4-b)pyrazin-7-yl)carbamic acid ethyl ester 122293-95-2 83269-10-7 Carbamic acid, (5-amino-1,2-dihydro-2-methyl-3-phenylpyrido(3,4-b)pyrazin-7-yl)-, ethyl ester NSC 350386