1	0AK	(2s)-2-amino-4-(2-chloroethoxy)-4-oxobutanoic acid	1.000
2	9J3	4-ethoxy-4-oxobutanoic acid	0.833
3	FL6	(2s)-2-azanyl-4-methoxy-4-oxidanylidene-butanoic acid	0.833
4	NF3	(~{z})-4-ethoxy-4-oxidanylidene-but-2-enoic acid	0.833
5	ASB	Aspartic acid-4-carboxymethyl ester	0.786
6	A0A	(2s)-2-amino-4-(formyloxy)-4-oxobutanoic acid	0.769
7	AVG	2-amino-4-(2-amino-ethoxy)-butyric acid	0.769
8	AMB	L-2-amino-4-methoxy-cis-but-3-enoic acid	0.750
9	AW9	(2z)-4-methoxy-4-oxobut-2-enoic acid	0.750
10	HMB	(4s)-4-hydroxy-4-methoxybutanoic acid	0.750
11	MSU	Succinic acid monomethyl ester	0.750
12	ASL	Aspartic acid-4-carboxyethyl ester	0.733