Using CCOC(=O)CC(C)=O, Nc1ccc(F)c(OCc2ccccc2)c1 to produce CCOC(=O)C=C(C)Nc1ccc(F)c(OCc2ccccc2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.