Using COC(=O)c1ccc(Nc2nc(NCCNCCN)nc(OCC(F)(F)F)n2)cc1 to produce NCCNCCNc1nc(Nc2ccc(C(=O)O)cc2)nc(OCC(F)(F)F)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.