Using CCOC=C(C(=O)OCC)C(=O)OCC, COCCNC(=N)c1cc(F)cc(F)c1 to produce CCOC(=O)c1cnc(-c2cc(F)cc(F)c2)n(CCOC)c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.