Using COC(=O)c1ccc2nc(-c3ccc(C4OCCCO4)cc3F)sc2c1 to produce O=C(O)c1ccc2nc(-c3ccc(C4OCCCO4)cc3F)sc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.