page_title: Taraxerol
section_title: Structure
hierarchical_section_title: Taraxerol / Chemistry / Structure
caption_attribution_description: English: Taraxerol molecule with numbered carbons for carbon identification
context_page_description: Taraxerol is a naturally-occurring pentacyclic triterpenoid. It exists in various higher plants, including Taraxacum officinale, Alnus glutinosa, Litsea dealbata, Skimmia spp., Dorstenia spp., Maytenus spp., and Alchornea latifolia. Taraxerol was named "alnulin" when it was first isolated in 1923 from the bark of the grey alder by Zellner and Röglsperger. It also had the name "skimmiol" when Takeda and Yosiki isolated it from Skimmia.
context_section_description: Taraxerol is an oleanan-3-ol with an alpha-methyl substituent at position 13, a missing methyl group at position 14, and a double bond between 14 and 15. The dominant biological stereoisomer in plant leaves and in sediments has the taraxer-14-en-3β-ol configuration. Taraxerol is a double-bond isomer of β-amyrin, another important naturally-occurring triterpenoid in higher plants. It is a colorless solid under room temperature with an estimated melting point of 283.50 °C and boiling point of 490.70 °C. It is practically insoluble in water and has a solubility of 9.552 × 10⁻⁵ mg/L estimated from octanol-water partition coefficient.
caption: Taraxerol carbon numbering.
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