Using COc1cc(CNc2nnc(Cl)cc2C(=O)Nc2ccc(C(C)(C)C)cc2)ccn1 to produce COc1cc(CNc2nnccc2C(=O)Nc2ccc(C(C)(C)C)cc2)ccn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.