Synonyms: Boc-Ala-Ala-Pro-Ala-p-Nitroaniline;N-BOC-L-ALA-ALA-PRO-ALA-P-NITROANILIDE;BOC-ALA-ALA-PRO-ALA-P-NITROANILIDE;L-Alaninamide,N-[(1,1-dimethylethoxy)carbonyl]-L-alanyl-L-alanyl-L-prolyl-N-(4-nitrophenyl)-(9CI);BOC-ALA-ALA-PRO-ALA-PNA;ELASTASE SUBSTRATE II, COLORIMETRIC;