Using O=C(O)Cc1cc(F)ccc1F, Nc1nccc2occ(-c3ccc4c(c3F)CCN4)c12 to produce Nc1nccc2occ(-c3ccc4c(c3F)CCN4C(=O)Cc3cc(F)ccc3F)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.