Venetoclax-N-Oxide impurity

Chemical Name: 4-(3-((1H-pyrrolo[2,3-b]pyridin-5-yl)oxy)-4-(((3-nitro-4-(((tetrahydro-2H-pyran-4-yl)methyl)amino)phenyl)sulfonyl)carbamoyl)phenyl)-1-((4'-chloro-5,5-dimethyl-3,4,5,6-tetrahydro-[1,1'-biphenyl]-2-yl)methyl)piperazine 1-oxide

Synonym: 4-{4-[(4’-chloro-5,5-dimethyl-3,4,5,6-tetrahydro[1,1’-biphenyl]-2-yl)methyl]-4-oxo-4λ5-piperaxin-1-yl}-N-(3-nitro-4-{[(oxan-4-yl)methyl]amino}benzene-1-sulfonyl)-2-[(1H-pyrrolo[2,3-b] pyridin-5-yl) oxy] benzamide