Pyridine, 4,​4′,​4”,​4”’-​(pentacyclo[12.2.2.2​6,​9.02,​5.010,​13]​eicosa-​6,​8,​14,​16,​17,​19-​hexaene-​3,​4,​11,​12-​tetrayl)​tetrakis-

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