Venetoclax Impurity 24; Metabolite M27

2- ((1H-pyrrolo[2,3-b]pyridin-5-yl) oxy) -4- (7- (4-chlorophenyl) -9,9-dimethyl-1,3,4,8,9,10,10a,11a-octahydro-2H,6H-benzo[e]pyrazino[2,1-b][1,3]oxazin-2-yl) -N- ((3-nitro-4- (((tetrahydro-2H-pyran-4-yl) methyl) amino) phenyl) sulfonyl) benzamide