1	NFQ	N-[(E)-iminomethyl]-L-aspartic acid	1.000
2	NCD	N-carbamoyl-L-aspartate	0.917
3	OEM	N-methyl-D-aspartic acid	0.909
4	SOQ	N-methyl-L-aspartic acid	0.909
5	C5S	N-formyl-D-aspartic acid	0.833
6	EKN	(2~{S})-2-(2-azanylethylamino)butanedioic acid	0.769
7	KKD	N-acetyl-L-aspartic acid	0.769
8	FUM	Fumaric acid	0.727
9	MAE	Maleic acid	0.727
10	MDH	N-methyldehydrobutyrine	0.727
11	SIN	Succinic acid	0.727