1 1JX (2r)-2-methyl-1,4-dihydropyrido[2,3-B]pyrazin-3(2h)-one 1.000 2 5QY (3~{S})-3-methyl-3,4-dihydro-1~{H}-quinoxalin-2-one 0.846 3 A1AYT 2,3-dimethylpyrido[2,3-B]pyrazine 0.846 4 A1CFZ (4as,8ar)-octahydroquinoxalin-2(1h)-one 0.769 5 4YO 6-bromo-3,4-dihydroquinoxalin-2(1h)-one 0.714 6 5GU 7-bromo-3,4-dihydroquinoxalin-2(1h)-one 0.714 7 5QX 1-methyl-3,4-dihydroquinoxalin-2-one 0.714 8 J5I 3-methyl-1,2-dihydroquinolin-2-one 0.714