Using CCOC1=CCc2cccc(NC(=O)Nc3ccc(Cl)c(C(F)(F)F)c3)c2C1 to produce O=C1CCc2cccc(NC(=O)Nc3ccc(Cl)c(C(F)(F)F)c3)c2C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.