Δ-Cadinol
δ-Cadinol is an organic compound, a sesquiterpenoid alcohol produced by many plants as well as some animals and microorganisms. It is a white crystalline solid, soluble in isopropyl ether and ethanol. It is an epimer of α-cadinol.
δ-Cadinol exists in nature as either of two enantiomers distinguished by the prefixes - and -. The -isomer was identified by E. Shinozaki in 1922 from the leaves of Torreya nucifera and originally named torreyol. The -isomer was isolated in 1951 by Haagen-Smit and others from Pinus albicaulus and first called albicaulol. Its structure was determined in 1970 by Lars Westfelt. Other names were given to δ-cadinol based on its various biological sources before the structures were confirmed, including sesquigoyol for -δ-cadinol and pilgerol for -δ-cadinol. Lambertol is thought to be either -δ-cadinol or -δ-cadinol. Cedrelanol was originally thought to be identical to -δ-cadinol but was later confirmed to have the structure of τ-cadinol.