Using COC(=O)c1ccc(CNc2nc(Nc3ccc(C(=O)OC)cc3)nc(OCC(F)(F)F)n2)cc1 to produce O=C(O)c1ccc(CNc2nc(Nc3ccc(C(=O)O)cc3)nc(OCC(F)(F)F)n2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.