1	EKN	(2~{S})-2-(2-azanylethylamino)butanedioic acid	1.000
2	KKD	N-acetyl-L-aspartic acid	0.846
3	OEM	N-methyl-D-aspartic acid	0.833
4	SOQ	N-methyl-L-aspartic acid	0.833
5	C5S	N-formyl-D-aspartic acid	0.769
6	NFQ	N-[(E)-iminomethyl]-L-aspartic acid	0.769
7	5XW	(2~{z})-2-(1-oxidanyl-3-oxidanylidene-propyl)iminobutanedioic acid	0.733
8	NSN	N~2~-(2-amino-1-methyl-2-oxoethylidene)asparaginate	0.733
9	NCD	N-carbamoyl-L-aspartate	0.714