1	C11	Undecyl-phosphinic acid butyl ester	1.000
2	DPE	N-undecanylphosphonate methyl ester group	0.833
3	MUP	Methoxyundecylphosphinic acid	0.789
4	TO4	Propan-2-yl (R)-dodec-11-en-1-ylphosphonofluoridate	0.762