1 AY5 [(~{S})-[4-[3-[(~{S})-(3,4-dichlorophenyl)-oxidanyl-methyl]phenyl]phenyl]-oxidanyl-methyl]phosphonic acid 1.000 2 AXK [(~{S})-[4-[3-[(~{R})-(3,4-dichlorophenyl)-oxidanyl-methyl]phenyl]phenyl]-oxidanyl-methyl]phosphonic acid 1.000