Using COC(=O)C(=O)N1CC(COc2ccc(Cl)cc2C(C)(C)C)C1 to produce CC(C)(C)c1cc(Cl)ccc1OCC1CN(C(=O)C(=O)O)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.