1	KOP	Methyl dihydrogen phosphate	1.000
2	EFS	Ethyl dihydrogen phosphate	0.857
3	XPO	Formyl phosphate	0.857
4	CP	Phosphoric acid mono(formamide)ester	0.750
5	EAP	2-amino-vinyl-phosphate	0.750
6	ISP	Phosphorylisopropane	0.750
7	OPE	Phosphoric acid mono-(2-amino-ethyl) ester	0.750
8	UVW	Acetylphosphate	0.750
9	ATJ	Ethyl hydrogen phosphonate	0.714
10	OO9	Oxidanyl dihydrogen phosphate	0.714