Using [N-]=[N+]=[N-], COc1ccc(-c2cc(C#N)c(N)c(-c3ccc(OC)cc3)c2)cc1 to produce COc1ccc(-c2cc(C#N)c(N=[N+]=[N-])c(-c3ccc(OC)cc3)c2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.