1 4I4 (5r,6r,8s)-8-(3-{[amino(imino)methyl]amino}phenyl)-5-cyclohexyl-6-hydroxy-3-oxo-1-phenyl-2,7-dioxa-4-aza-6-phosphanonan-9-oic acid 6-oxide 1.000 2 2P6 (2s)-1-[1-(4-phenylbutanoyl)-L-prolyl]pyrrolidine-2-carbonitrile 0.862 3 2P2 1-[(2r,5s)-2-tert-butyl-5-({(2s)-2-[(1r)-1,2-dihydroxyethyl]pyrrolidin-1-yl}carbonyl)pyrrolidin-1-yl]-4-phenylbutan-1-one 0.714