1: 79 percent / α-chymotrypsin, H2O / methanol / 2 h / Ambient temperature; pH 9 2: 1) pentafluorophenol/DCC / 1) DMF, 4 h, r.t.; 2) 2 h, r.t. View Scheme

With  water; α-chymotrypsin in  methanol 2 h;  Ambient temperaturepH 9;