1	QNY	O-[(3s)-3-amino-3-carboxy-1,1-dihydroxypropyl]-L-threonine	1.000
2	AEI	Threonine-aspartic ester	0.941
3	1X6	O-[(2e)-3-aminoprop-2-enoyl]-L-serine	0.706
4	432	O-butanoyl-L-serine	0.706