1	VX	O-ethylmethylphosphonic acid ester group	1.000
2	UCJ	Propan-2-yl hydrogen (S)-methylphosphonate	0.875
3	ATJ	Ethyl hydrogen phosphonate	0.857
4	CVX	O-butlylmethylphosphonic acid ester group	0.778
5	H9A	Propan-2-yl hydrogen (R)-ethylphosphonate	0.778
6	VR	2-methylpropyl hydrogen (R)-methylphosphonate	0.778
7	EFS	Ethyl dihydrogen phosphate	0.750