1 9SW Methoxy-[(3~{R})-3-[(2~{R})-1-methoxy-1,3-bis(oxidanylidene)butan-2-yl]pentadecyl]phosphinic acid 1.000 2 IY8 Methoxy-[(~{E},3~{R})-3-[(2~{R})-1-methoxy-1,3-bis(oxidanylidene)butan-2-yl]tridec-11-enyl]phosphinous acid 0.929