1	MIS	Monoisopropylphosphorylserine	1.000
2	MIR	Monoethylphosphorylserine	0.929
3	SGB	O-[(S)-methyl(1-methylethoxy)phosphoryl]-L-serine	0.867
4	OMH	O-[(S)-hydroxy(methoxy)phosphoryl]-L-serine	0.857
5	SVX	O-[(R)-ethoxy(methyl)phosphoryl]-L-serine	0.800
6	GSE	L-alpha-glycerophosphorylserine	0.765
7	KSV	(2r)-2,3-dihydroxypropyl ethyl hydrogen (S)-phosphate	0.733
8	SGR	O-[(R)-amino(methoxy)phosphoryl]-L-serine	0.733
9	SGX	O-[(S)-amino(methoxy)phosphoryl]-L-serine	0.733
10	SVY	O-[bis(1-methylethoxy)phosphoryl]-L-serine	0.722
11	RVX	O-[methyl(2-methylpropoxy)phosphoryl]-L-serine	0.706
12	SDP	2-amino-3-(diethoxy-phosphoryloxy)-propionic acid	0.706
13	SUN	O-[(R)-(dimethylamino)(ethoxy)phosphoryl]-L-serine	0.706