1	UVW	Acetylphosphate	1.000
2	EFS	Ethyl dihydrogen phosphate	0.875
3	XPO	Formyl phosphate	0.875
4	CP	Phosphoric acid mono(formamide)ester	0.778
5	EAP	2-amino-vinyl-phosphate	0.778
6	ISP	Phosphorylisopropane	0.778
7	OPE	Phosphoric acid mono-(2-amino-ethyl) ester	0.778
8	ATJ	Ethyl hydrogen phosphonate	0.750
9	KOP	Methyl dihydrogen phosphate	0.750
10	1SH	2-(methylamino)ethyl dihydrogen phosphate	0.700
11	PDI	Phosphoric acid mono-(3-hydroxy-propyl) ester	0.700
12	PGA	2-phosphoglycolic acid	0.700
13	U4R	(2e)-but-2-en-1-yl dihydrogen phosphate	0.700