1 BGF 2,5-bis(4-guanylphenyl)furan 1.000 2 4UP 6-[(2s,3s)-3-phenyloxiran-2-yl]naphthalene-2-carboximidamide 0.731 3 745 Trans-6-(2-phenylcyclopropyl)-naphthalene-2-carboxamidine 0.731 4 BPF N,N'-(furan-2,5-diylbis{benzene-4,1-diyl[(z)-aminomethylylidene]})diethanaminium 0.724