1 BPU 7-bromopyrrolo[1,2-a]quinoxalin-4(5h)-one 1.000 2 53Y Pyrrolo[1,2-a]quinoxalin-4(5h)-one 0.933 3 5GU 7-bromo-3,4-dihydroquinoxalin-2(1h)-one 0.800 4 LDR Phenanthridin-6(5h)-one 0.765 5 U4C (2s)-1',4'-dihydro-2'H-spiro[pyrrolidine-2,3'-quinolin]-2'-one 0.765 6 W2M (2r)-1',4'-dihydro-2'H-spiro[pyrrolidine-2,3'-quinolin]-2'-one 0.765 7 9CA 9h-carbazole 0.750 8 JRP (1~{R},10~{R},12~{S})-15-oxa-8-azatetracyclo[8.5.0.0^{1,12}.0^{2,7}]pentadeca-2(7),3,5-trien-9-one 0.722