Using CCOC(=O)c1cn(C2CC2)c2c(F)c(F)c(F)cc2c1=O to produce O=C(O)c1cn(C2CC2)c2c(F)c(F)c(F)cc2c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.