[Tc].C#Nc1ccc(cc1)N(O)=O.C#Nc2ccc(cc2)N(O)=O.C#Nc3ccc(cc3)N(O)=O.C#Nc4ccc(cc4)N(O)=O.C#Nc5ccc(cc5)N(O)=O.C#Nc6ccc(cc6)N(O)=O