1,2,4-Triazolo[4,3-b]pyridazine, 6-chloro- 28593-24-0 6-Chloro-1,2,4-triazolo[4,3-b]pyridazine 6-Chloro-s-triazolo[4,3-b]pyridazine NSC228162 s-Triazolo[4,3-b]pyridazine, 6-chloro-