2,2',5,5'-Tetrahydroxy-4,4'-bis[(2E,6E,10E)-3,7,11,15-tetramethyl-2,6,10,14-hexadecatetrenyl]-1,1'-bi-[1,4-cyclohexadiene]-3,3',6,6'-tetrone;Diboviquinone 4,4
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