1	SGB	O-[(S)-methyl(1-methylethoxy)phosphoryl]-L-serine	1.000
2	SVX	O-[(R)-ethoxy(methyl)phosphoryl]-L-serine	0.929
3	MIS	Monoisopropylphosphorylserine	0.867
4	RVX	O-[methyl(2-methylpropoxy)phosphoryl]-L-serine	0.812
5	MIR	Monoethylphosphorylserine	0.800
6	OMH	O-[(S)-hydroxy(methoxy)phosphoryl]-L-serine	0.733
7	SGR	O-[(R)-amino(methoxy)phosphoryl]-L-serine	0.733
8	SGX	O-[(S)-amino(methoxy)phosphoryl]-L-serine	0.733
9	SVY	O-[bis(1-methylethoxy)phosphoryl]-L-serine	0.722
10	SDP	2-amino-3-(diethoxy-phosphoryloxy)-propionic acid	0.706
11	SUN	O-[(R)-(dimethylamino)(ethoxy)phosphoryl]-L-serine	0.706