Using Cc1cc2c(c3c1NC(=O)C(C)(C)C3)OC(CBr)C2C, [N-]=[N+]=[N-] to produce Cc1cc2c(c3c1NC(=O)C(C)(C)C3)OC(CN=[N+]=[N-])C2C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.