Using CCOC(=O)c1cn2c(-c3ccc(Cl)cc3Cl)c(CCl)c(C)nc2n1, [N-]=[N+]=[N-] to produce CCOC(=O)c1cn2c(-c3ccc(Cl)cc3Cl)c(CN=[N+]=[N-])c(C)nc2n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.