Using COC(=O)CCCCCCc1ncc(-c2cc(Cl)ccc2OC(C)C)s1 to produce COC(=O)CCCCCCc1ncc(-c2cc(Cl)ccc2O)s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.