italicene
(1s (1S, 3a 3ar ,8ar)-1 8aR)-1,4,4,6-四甲基-1 6-tetramethyl-1,2,3,3a 3a,4,4a 4a,7,8-八氢环戊[1 8-octahydrocyclopenta[1, 4] cyclobuta cyclobuta [1 ,2]苯 2]benzene

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