Using N=C(N)CC(=N)N, CCOC(=O)c1nc(Cc2ccccc2F)c2ncccn12 to produce Nc1cc(N)nc(-c2nc(Cc3ccccc3F)c3ncccn23)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.