154925-56-1

?N,N,N',N'-tetra(2-pyridyl)-biphenyl-4,4'-diamine 1,1'-Biphenyl]-4,4'-diamine, N,N,N',N'-tetra-2-pyridinyl- [1,1'-Biphenyl]-4,4'-diamine,N4,N4,N4',N4'-tetra-2-pyridinyl- N4,N4,N4',N4'-tetra(pyridin-2-yl)-[1,1'-biphenyl]-4,4'-diamine [1,1'-Biphenyl]-4,4'-diamine, N4,N4,N4',N4'-tetra-2-pyridinyl-