IUPAC: (1R,2R,3aS,3bS,8S,9aR,9bR,11aR)-1-[(2R,4E)-2,6-dihydroxy-6-methyl-3-oxohept-4-en-2-yl]-2,8-dihydroxy-9b-(hydroxymethyl)-3a,6,6,11a-tetramethyl-1H,2H,3H,3aH,3bH,4H,6H,7H,8H,9H,9aH,9bH,10H,11H,11aH-cyclopenta[a]phenanthrene-7,10-dione

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