Using [N-]=[N+]=[N-], CCC(CC(=O)CCl)c1ccc(C(=O)OC)cc1 to produce CCC(CC(=O)CN=[N+]=[N-])c1ccc(C(=O)OC)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.