benzyl (1-cyanoethyl)glycinate

3,5-Dichloro-1-ethoxycarbonylmethyl-6-methylpyrazinone

(5-Chloro-6-methyl-2-oxo-3-phenethylamino-2H-pyrazin-1-yl)-acetic acid ethyl ester

[[2-[(2-hydroxypropyl)amino]-1,2-dioxoethyl]amino]acetic acid ethyl ester

Ethyl N-{oxo[(2-oxopropyl)amino]acetyl}glycinate