Using O=C(Nc1ccc(F)c(C(=O)c2c[nH]c3ncc(Cl)cc23)c1F)OCc1ccccc1 to produce Nc1ccc(F)c(C(=O)c2c[nH]c3ncc(Cl)cc23)c1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.