7536-58-5 Aspartic acid, N-carboxy-, 4-benzyl N-tert-butyl ester, L- L-Aspartic acid, N-[(1,1-dimethylethoxy)carbonyl]-, 4-(phenylmethyl) ester N-[(1,1-Dimethylethoxy)carbonyl]-L-aspartic acid, 4-(phenylmethyl) ester N-tert-Butoxycarbonyl-L-aspartic acid .beta.-benzyl ester N-tert-Butoxycarbonyl-L-aspartic acid 4-benzyl ester NSC118538