87607-25-8 Carbamic acid, (5-amino-1,2-dihydro-2,3-diphenylpyrido(3,4-b)pyrazin-7-yl)-, ethyl ester Ethyl (5-amino-1,2-dihydro-2,3-diphenylpyrido(3,4-b)pyrazin-7-yl)carbamate