1	1X6	O-[(2e)-3-aminoprop-2-enoyl]-L-serine	1.000
2	42Y	O-propanoyl-L-serine	0.917
3	432	O-butanoyl-L-serine	0.846
4	7BC	3-(acryloyloxy)propanoic acid	0.833
5	OAS	O-acetylserine	0.833
6	J8W	(2~{S})-2-azanyl-3-(3-oxidanyl-3-oxidanylidene-propanoyl)oxy-propanoic acid	0.786
7	K5L	(2~{R})-2-azanyl-3-(3-oxidanyl-3-oxidanylidene-propanoyl)oxy-propanoic acid	0.786
8	0AH	O-(bromoacetyl)-L-serine	0.769
9	73C	(2~{S})-2-azanyl-3-butoxy-propanoic acid	0.769
10	SRZ	Propoxy-L-serine	0.769
11	TH5	O-acetyl-L-threonine	0.769
12	TIS	O-(1,1-dihydroxyethyl)-L-serine	0.769
13	AEI	Threonine-aspartic ester	0.750
14	AZS	O-diazoacetyl-L-serine	0.714
15	QNY	O-[(3s)-3-amino-3-carboxy-1,1-dihydroxypropyl]-L-threonine	0.706