DIBENZO[B,F]-1,3A,4,6A-TETRAAZAPENTALENE

6H,12H-BENZOTRIAZOLO[2,1-A]BENZOTRIAZOLE

5H,11H-BENZOTRIAZOLO[2,1-A]BENZOTRIAZOLE

5H,11H-Benzotriazolo[2,1-a]benzotriazole Dibenzo[b,f]-1,3a,4,6a-tetraazapentalene