Using CC(C)(C)OC(=O)Oc1ccc(F)c(C(=O)c2ccc3nccnc3c2)c1F to produce O=C(c1ccc2nccnc2c1)c1c(F)ccc(O)c1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.