1 N4A 4,4'-[{3-[(naphthalen-2-ylsulfonyl)amino]pyridine-2,6-diyl}bis(oxy)]dibenzenecarboximidamide 1.000 2 F4D 4,4'-[(3-{[(4-fluorophenyl)sulfonyl]amino}pyridine-2,6-diyl)bis(oxy)]dibenzenecarboximidamide 0.878