117722-96-0 Baapap Boc-ala-ala-pro-asp-pna L-alpha-Asparagine, N(sup 2)-(1-N-(N-((1,1-dimethylethoxy)carbonyl)-L-alanyl-L-alanyl)-L-prolyl)-N-(4-nitrophenyl)- N-tert-Butoxycarbonyl-alanyl-alanyl-prolyl-aspartyl-4-nitroanilide