5-Chloro-7-azaindole (CAS NO.866546-07-8) is also named as 1H-pyrrolo[2,3-b]pyridine, 5-chloro- ; 5-Chlor-1H-pyrrolo[2,3-b]pyridin ; 5-Chloro-1H-pyrrolo[2,3-b]pyridine .