Using CC(C)(C)OC(=O)NC(CN=[N+]=[N-])CNC(=O)OCc1ccccc1 to produce CC(C)(C)OC(=O)NC(CN)CNC(=O)OCc1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.