1 C63 (2r)-2,3-bis(hexyloxy)propyl hydrogen (S)-pentylphosphonate 1.000 2 HY4 (2r)-2,3-dibutoxypropyl hydrogen (S)-propylphosphonate 0.769 3 2HD (2r)-2,3-dibutoxypropyl (R)-octylphosphinate 0.724 4 44E (2r)-3-(phosphonooxy)propane-1,2-diyl dihexanoate 0.724