1 4O3 (11as)-6-(4-fluorobenzyl)-5,6,11,11a-tetrahydro-1h-imidazo[1',5':1,6]pyrido[3,4-B]indole-1,3(2h)-dione 1.000 2 4O2 3-[(11as)-6-(4-fluorobenzyl)-1,3-dioxo-5,6,11,11a-tetrahydro-1h-imidazo[1',5':1,6]pyrido[3,4-B]indol-2(3h)-yl]propanoic acid 0.839 3 ZZW 9-(4-fluorobenzyl)-N-hydroxy-9h-beta-carboline-3-carboxamide 0.700