Using CCCc1nc2ccccc2n1Cc1ccc(C2=C(C(=O)OC)CCC2)cc1 to produce CCCc1nc2ccccc2n1Cc1ccc(C2=C(C(=O)O)CCC2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.