1 MT8 (1r)-1-hydroxy-1-methyl-2,3,6,7-tetrahydro-1h,5h-pyrido[3,2,1-ij]quinolin-5-one 1.000 2 18N 1h-benzo[de]isoquinoline-1,3(2h)-dione 0.722 3 X8D 5-methyl[1,2,4]triazolo[4,3-a]quinolin-1(2h)-one 0.722 4 PYQ Pyroquilon 0.706