Using Clc1ccnc2c1CCN(Cc1ccccc1)C2, [N-]=[N+]=[N-] to produce [N-]=[N+]=Nc1ccnc2c1CCN(Cc1ccccc1)C2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.