Using [N-]=[N+]=NCc1ccc(Cl)c(Cl)c1, COC(=O)CC(C)=O to produce COC(=O)c1nnn(Cc2ccc(Cl)c(Cl)c2)c1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.