Using COCCl, COC(=O)c1ccc2[nH]nc(-c3cccc(F)c3)c2c1 to produce COCn1nc(-c2cccc(F)c2)c2cc(C(=O)OC)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.