Abstract The controversy with regard to the structures of the closely related polyisoprenylated phenolic compounds, garcinol, isogarcinol, camboginol, cambogin, xanthochymol and isoxanthochymol is cleared by X-ray crystallographic analysis of the naturally occurring isogarcinol. The unusual UV spectral characteristics of the chromophore of isogarcinol are discussed.
[Gustafson, Kirk R.; Blunt, John W.; Munro, Murray H. G.; Fuller, Richard W.; McKee, Tawnya C.; Cardellina II, John H.; McMahon, James B.; Cragg, Gordon M.; Boyd, Michael R. Tetrahedron, 1992 , vol. 48, # 46 p. 10093 - 10102]
![(1S,3Z,5S,7S)-3-[(3,4-dihydroxyphenyl)-hydroxy-methylidene]-8,8-dimethyl-1,7-bis(3-methylbut-2-enyl)-5-[(2R)-5-methyl-2-prop-1-en-2-yl-hex-5-enyl]bicyclo[3.3.1]nonane-2,4,9-trione Structure](https://image.chemsrc.com/caspic/464/52617-32-0.png)
![10-(3,4-Dihydroxybenzoyl)-3,4,5,6,7,8-hexahydro-2,2,7,7-tetramethyl-3α,6α,8-tris(3-methyl-2-butenyl)-9H-4aβ,8β-methano-2H-cycloocta[b]pyran-9,11-dione Structure](https://image.chemsrc.com/caspic/426/52617-33-1.png)