Synonyms: Butanoicacid, 4-[(2,5-dioxo-1-pyrrolidinyl)oxy]-4-oxo-3-[[(phenylmethoxy)carbonyl]amino]-,1,1-dimethylethyl ester, (3S)- (9CI);Butanoic acid,4-[(2,5-dioxo-1-pyrrolidinyl)oxy]-4-oxo-3-[[(phenylmethoxy)carbonyl]amino]-,1,1-dimethylethyl ester, (S)-;Succinimide, N-[(N-carboxy-L-a-aspartyl)oxy]-, N-benzyl tert-butylester (7CI,8CI);Aspartic acid, N-carboxy-, N-benzyl 4-tert-butyl ester,succinimido deriv., L- (8CI);N-Benzyloxycarbonyl-L-aspartic acid5-tert-butyl-1-hydroxysuccinimide diester;Z-Asp(OtBu)-OSu;