4-N-[4-[N-[4-[N-[4-[4-[N-[4-(3-butoxy-N-(3-methylphenyl)anilino)phenyl]-4-(N-(2,5-dimethylphenyl)-4-methylanilino)anilino]-N-(2,4,6-trimethylphenyl)anilino]phenyl]-4-(4-methyl-N-(4-methylphenyl)anilino)anilino]phenyl]-4-(4-methyl-N-(4-methylphenyl)anilino)anilino]phenyl]-1-N,1-N,4-N-tris(4-methylphenyl)benzene-1,4-diamine