(S)-(2-((2-((4-甲基-1-((4-硝基苯基)氨基)-1-氧代戊烷-2-基)氨基)-2-氧代乙基)氨基)-2-氧代乙基)氨基甲酸叔丁酯; tert-Butyl (S)-(2-((2-((4-methyl-1-((4-nitrophenyl)amino)-1-oxopentan-2-yl)amino)-2-oxoethyl)amino)-2-oxoethyl)carbamate; subtilisin a substrate i,colorimetric; subtilisin a substrate i
