Using [N-]=[N+]=[N-], Nc1nc(Cl)c2ncn(CCCCl)c2n1 to produce [N-]=[N+]=NCCCn1cnc2c(Cl)nc(N)nc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.