1 1UQ [(S)-({2-[hydroxy(methyl)amino]-2-oxoethyl}sulfanyl)(phenyl)methyl]phosphonic acid 1.000 2 A1L2H [(~{S})-(4-hexoxyphenyl)-[2-[methyl(oxidanyl)amino]-2-oxidanylidene-ethyl]sulfanyl-methyl]phosphonic acid 0.720 3 A1L6A [(~{S})-(3-hexoxyphenyl)-[2-[methyl(oxidanyl)amino]-2-oxidanylidene-ethyl]sulfanyl-methyl]phosphonic acid 0.720