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

Smile: ClC(C=C1)=CC=C1C2=C(CCC(C)(C)C2)C[N+]3([O-])CCN(C4=CC(OC5=CC(C=CN6)=C6N=C5)=C(C(NS(C7=CC([N+]([O-])=O)=C(NCC8CCOCC8)C=C7)(=O)=O)=O)C=C4)CC3