1	NEN	1-ethyl-pyrrolidine-2,5-dione	1.000
2	NEQ	N-ethylmaleimide	1.000
3	LCY	1-methylpyrrolidine-2,5-dione	0.889
4	V7J	2-(2,5-dioxopyrrolidin-1-yl)acetamide	0.818
5	MB3	1-methylpyrrolidin-2-one	0.778
6	SZB	Succinimide	0.778
7	SUI	(3-amino-2,5-dioxo-1-pyrrolidinyl)acetic acid	0.750
8	PZI	2-(2-oxopyrrolidin-1-yl)acetamide	0.727
9	SNN	L-3-aminosuccinimide	0.700