Using COc1ccc(C2(CNC(=O)c3cc4cc(Cl)ncc4[nH]3)OCCO2)cc1 to produce COc1ccc(C(=O)CNC(=O)c2cc3cc(Cl)ncc3[nH]2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.