label: 8-(butylethylamino)-4-(2,6-dimethoxypyridin-3-yl)-6-methyl-3,4-dihydro-1H-pyrido(2,3-b)pyrazin-2-one
label_lc: 8-(butylethylamino)-4-(2,6-dimethoxypyridin-3-yl)-6-methyl-3,4-dihydro-1h-pyrido(2,3-b)pyrazin-2-one