82586-04-7 Carbamic acid, (5-amino-3-(1,1'-biphenyl)-4-yl-1,2-dihydropyrido(3,4-b)pyrazin-7-yl)-, ethyl ester Ethyl (5-amino-3-(1,1'-biphenyl)-4-yl-1,2-dihydropyrido(3,4-b)pyrazin-7-yl)carbamate