The synthesis of 11H‐1,2,4‐triazolo[4,3‐b]pyridazino[4,5‐b]indoles,11H‐tetrazolo[4,5‐b]pyridazino[4,5‐b]indoles and 1,2,4‐triazolo[3,4‐f]‐1,2,4‐triazino[4,5‐a]indoles | Publicación