Using CCCCCCCOc1ccccc1C=CC(CCCCC(=O)O)Cc1ccc(C(=O)O)cc1 to produce CCCCCCCOc1ccccc1CCC(CCCCC(=O)O)Cc1ccc(C(=O)O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.