Multifloranes

Rhododendron species. In providing the name of the 10 multifloranes known to date, Gelonium multiflorum contains (-)-7-multifloren-3p-ol (multiflorenol) in the leaves the methylether is a constituent of the wax of flie leaves of sugar cane Sac-charum officinarum (Poaceae). The term of rarely abundant baueranes stems from Achronychia baueri with (-)-7-baueren-3p-ol as a constituent which also occurs in Ilex species (Aquifoliaceae), giving rise to the synonym ilexol. 

Akihisa, T, Tokuda, H, Ichiishi, E, Mukainaka, T, Toriumi, M, Ukiya, M, Yasiikawa, K, Nishino, H Anti-tumor promoting effects of multiflorane-t5fpe triterpenoids and cytotoxic activity ofkarounidiol against human cancer cell lines. Cancer Lett. 173(1), 9-14 (2001)... 

Fig. 8.1.32. Biogenesis of taraxerane, multiflorane, glutinane, and fridelane types...

Similar rearrangements in the ursane series (cf. cation 530) are known but appear to be of minor consequence in elaborating new compounds no more than a dozen triterpenoids belonging to all these types (cf. Fig. 8.1.32) have been isolated so far. Of these, only baueranes (corresponding to the multiflorane type) (Fig. 8.1.32) have been encountered in woody tissues. Thus, the simplest member, bauerenol (554), has been found to occur in the barks of Acronychia baueri and Ilex crenata (229). Phyllanthol (555), from the root-bark of Phyllanthus engleri, represents an alternative fate for the isoursane cation (ursane equivalent of cation 543) (109, 228). 

Taraxeranes, Multiflorane, Glutinanes, Friedelanes, Isoursane, Phyllanthane,... 

---