1	DPF	Diethyl hydrogen phosphate	1.000
2	DEP	Diethyl phosphonate	0.889
3	DPJ	O,O-diethyl hydrogen thiophosphate	0.800
4	KFG	Dimethyl hydrogen phosphate	0.778
5	KSV	(2r)-2,3-dihydroxypropyl ethyl hydrogen (S)-phosphate	0.750
6	DFP	Diisopropyl phosphonate	0.727
7	E9E	1-[methoxy(methyl)phosphoryl]oxyethane	0.700