Using CCOC(=O)CC(=O)Nc1ccc(Oc2ncnn3cccc23)c(F)c1 to produce O=C(O)CC(=O)Nc1ccc(Oc2ncnn3cccc23)c(F)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.