Using CCOC(=O)CN=[N+]=[N-], O=Cc1cncn1-c1ccc(Br)cc1 to produce CCOC(=O)C(=Cc1cncn1-c1ccc(Br)cc1)N=[N+]=[N-], please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.