1	E9E	1-[methoxy(methyl)phosphoryl]oxyethane	1.000
2	DEP	Diethyl phosphonate	0.778
3	A1ING	Dimethyl hydrogen phosphite	0.750
4	DII	Methylphosphonic acid diisopropyl ester	0.727
5	DPF	Diethyl hydrogen phosphate	0.700
6	DPJ	O,O-diethyl hydrogen thiophosphate	0.700