1 RC5 [(2r)-2-{2-[hydroxy(methyl)amino]-2-oxoethyl}-5-phenylpentyl]phosphonic acid 1.000 2 L50 [(2r)-2-{2-[hydroxy(methyl)amino]-2-oxoethyl}-5-(4-methylphenyl)pentyl]phosphonic acid 0.955 3 L56 [(2r)-2-{2-[hydroxy(methyl)amino]-2-oxoethyl}-5-(3-methylphenyl)pentyl]phosphonic acid 0.955 4 LC7 [(2r)-5-(3-fluorophenyl)-2-{2-[hydroxy(methyl)amino]-2-oxoethyl}pentyl]phosphonic acid 0.955 5 6J8 [(2r)-2-{2-[hydroxy(methyl)amino]-2-oxoethyl}-5-(4-methoxyphenyl)pentyl]phosphonic acid 0.913 6 6JB [(2r)-2-{2-[hydroxy(methyl)amino]-2-oxoethyl}-5-(3-methoxyphenyl)pentyl]phosphonic acid 0.913 7 L54 {(2r)-2-{2-[hydroxy(methyl)amino]-2-oxoethyl}-5-[4-(trifluoromethyl)phenyl]pentyl}phosphonic acid 0.840 8 LC5 [(2r)-2-{2-[hydroxy(methyl)amino]-2-oxoethyl}-5-(naphthalen-1-yl)pentyl]phosphonic acid 0.840