(3S)-3-[(tert-butoxycarbonyl)amino]-4-hydroxybutanoic acid tert-butyl ester
Boc-Asp(OtBu)-OH
3-t-butoxycarbonylamino-N-(2-nitro-4-octadecylcarbamoylbenzyl)succinamic acid t-butyl ester
1-<1-(4',5'-dimethoxy-2'-nitrophenyl)ethyl> 4-tert-butyl N-(tert-butoxycarbonyl)aspartate