4-Nitro-1H-pyrrolo[2,3-b]pyridine 7-oxide

4-nitro-1h-pyrrolo[2,3-b]pyridine-7-oxyde ; 4-nitro-7-oxide-7-azaindole ; 1h-pyrrolo[2,3-b]pyridine, 4-nitro-, 7-oxide ; 7-hydroxy-4-nitropyrrolo[2,3-b]pyridine ; 4-nitro-7h-1$l^{5},7-pyrrolo[2,3-b][1$l^{5}]pyridin-1-one ; 1h-pyrrolo[2,3-b]pyridine, 4-nitro-, 7-oxide-2 ; 4-nitro-1h-pyrrolo[2,3-b]pyridine 7-oxide ; 4‐nitro‐1h‐pyrrolo[2,3‐b]pyridin‐7‐ium‐7‐olate ; 4-nitro-7-oxide-7-azaindole ,97%