<2-<<(1,1-dimethylethoxy)carbonyl>amino>ethoxy>acetic acid
ethyl α-<2-<<(1,1-dimethylethoxy)carbonyl>amino>ethoxy>benzenepropanoate
2-Benzyl-2-(2-tert-butoxycarbonylamino-ethoxy)-3-phenyl-propionic acid ethyl ester
2-(2-aminoethoxyl)acetic acid
2-[2-[N''-(benzyloxycarbonyl)-N'-[2-(ethoxycarbonylmethoxy)ethyl]guanidinyl]ethoxy]acetic acid ethyl ester