Using Oc1noc2ccc(Cl)cc12, CC(C)(C)OC(=O)NC(CO)CC#N to produce CC(C)(C)OC(=O)NC(CC#N)COc1noc2ccc(Cl)cc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.