Taraxerane derivatives

Several taraxerane derivatives have been reported. These include taraxer-14-ene-3/3,29-diol (127), the diacetate (128), 29-hydroxytaraxer-14-en-3-one (129), the acetate (130), 14a-hydroxytaraxeran-3-one (131), and taraxerane-3/3,14a-diol (132) from the stems of Lithocarpus cornea and epitaraxeryl acetate from Melaleuca leucadendron ° ... 

This Reporter prefers to name these compounds as derivatives of taraxastane rather than taraxane since this is less confusing with respect to the taraxerane group. 

Taraxeral (14-taraxeren-3jS-ol). Formula, see triterpenes. C30H50O, Mr 426.73, mp. 282-283 °C, [ajp -t0.7° (CHCI3). T. is a triterpene widely distribute in the plant kingdom, isolated for the first time in 1923 from the bark of gray alder (Alntts incana). T. also occurs in the roots of dandelion (Taraxacum officinale), in various alder species, rhododendron species, and Euphoibiaceae, as well as in some lichens. T. is derived from the taraxerane skeleton and has antigastritic properties. 

Taraxarol, alnulin, skimmioL- a simple, unsaturated, pentacyclic triterpene alcohol, M, 426.73, m.p. 285 °C, [a]i,-H3°, structurally a derivative of the patent hydrocarbon, 5a-taraxerane. It occurs in many members of the Compositae, e. g.dandelion (Taraxa-um officinale), and in alder (Alnus) bark. 

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