Using CCCCCc1ccc(-c2ncc(-c3ccc(OC(C)C)cc3)cn2)cc1 to produce CCCCCc1ccc(-c2ncc(-c3ccc(O)cc3)cn2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.