Using CCCCCc1c(/C=C/C(=O)OC)n(C)c2cc(OC)ccc12 to produce CCCCCc1c(/C=C/C(=O)O)n(C)c2cc(OC)ccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.