Using COC(=O)[C@H](N)C(C)C, CCCSc1nc2ccc(S(=O)(=O)Cl)cc2o1 to produce CCCSc1nc2ccc(S(=O)(=O)N[C@@H](C(=O)OC)C(C)C)cc2o1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.