Using CCOC(=O)CCC(=O)OCC, Cc1ccc(C(=O)c2ccc(C)cc2)cc1 to produce Cc1ccc(C(=CCC(=O)O)c2ccc(C)cc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.