1	SVX	O-[(R)-ethoxy(methyl)phosphoryl]-L-serine	1.000
2	SGB	O-[(S)-methyl(1-methylethoxy)phosphoryl]-L-serine	0.929
3	RVX	O-[methyl(2-methylpropoxy)phosphoryl]-L-serine	0.867
4	MIR	Monoethylphosphorylserine	0.857
5	MIS	Monoisopropylphosphorylserine	0.800
6	OMH	O-[(S)-hydroxy(methoxy)phosphoryl]-L-serine	0.786
7	SGR	O-[(R)-amino(methoxy)phosphoryl]-L-serine	0.786
8	SGX	O-[(S)-amino(methoxy)phosphoryl]-L-serine	0.786
9	SDP	2-amino-3-(diethoxy-phosphoryloxy)-propionic acid	0.750
10	SUN	O-[(R)-(dimethylamino)(ethoxy)phosphoryl]-L-serine	0.750
11	SBG	O-[(S)-hydroxy(methyl)phosphoryl]-L-serine	0.714
12	GSE	L-alpha-glycerophosphorylserine	0.706
13	SXE	O-{(S)-ethoxy[(1-methylethyl)amino]phosphoryl}-L-serine	0.706