Using COc1ccc2c(Nc3c(Cl)cncc3Cl)cc(=O)oc2c1OCC1CC1 to produce COc1ccc2c(Nc3c(Cl)cncc3Cl)cc(=O)oc2c1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.