Using CCCCCCCCCCC=CCCCNc1ccc(C(=O)NCC(=O)OCC)cc1 to produce CCCCCCCCCCC=CCCCNc1ccc(C(=O)NCC(=O)O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.