Using COCC(=O)N(c1c(C)cccc1N)C(C)C(=O)OC, [N-]=[N+]=[N-] to produce COCC(=O)N(c1c(C)cccc1N=[N+]=[N-])C(C)C(=O)OC, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.