1 E0U 2-[3-[[8-(methylamino)-2-oxidanylidene-1~{H}-quinolin-3-yl]carbonylamino]phenyl]ethanoic acid 1.000 2 E0L 3-[[8-(methylamino)-2-oxidanylidene-1~{H}-quinolin-3-yl]carbonylamino]benzoic acid 0.821 3 E0R 4-[[8-(methylamino)-2-oxidanylidene-1~{H}-quinolin-3-yl]carbonylamino]benzoic acid 0.759 4 FKR 4-[[6-fluoranyl-8-(methylamino)-2-oxidanylidene-1~{H}-quinolin-3-yl]carbonylamino]benzoic acid 0.733