1 J1J N-[(2s)-1-({5-[(diaminomethylidene)amino]pentyl}amino)-1-oxo-3-phenylpropan-2-yl]-4-hydroxy-2-oxo-1,2-dihydroquinoline-6-carboxamide 1.000 2 IXA N-[(2s)-1-({4-[(diaminomethylidene)amino]butyl}amino)-1-oxo-3-phenylpropan-2-yl]-4-hydroxy-2-oxo-1,2-dihydroquinoline-6-carboxamide 0.769 3 E6U N-[(1s)-1-benzyl-2-(3-guanidinopropylamino)-2-oxo-ethyl]-4-hydroxy-2-oxo-1h-quinoline-6-carboxamide 0.744