Malabaricane triterpenoids

Triterpenoids are a minor group of sponge metabolites of these malabaricane/isomalabaricane triterpenoids, Fig. (21) are known from Jaspis and Stelletla sponge species. All of this group shows cytotoxicity and anti-HIV activity [136-139]. 

P-Sitosterol and stigmasterol are the common steroids in the genus. So far only few common triterpenes such as friedelin (207), e/ /-fnedelinol (208), a-amyrin (204), P-amyrin (205), a-amyrin acetate (206), taraxasterol (213), lupeyl acetate (209), magnificol (210) were isolated from Tanacetum species. However, T. sinaicum afforded unusual new malabaricane type triterpenoids 3p-acetoxymalabarican-14(26),17E,21-triene (211) and 3-oxo-malabarica-14(26),17E,21-triene (212) (Table 1). 

Sodagnitins. Chromogenic (color change with aq. KOH colorless reddish violet) triterpenoids (with modified malabaricane skeleton) from die cap skins of the toadstools Cortinarius sodagnitus. C. fulvoincar-natus and C. arcuatorum, e.g., S. C Cj HjoOio, Mr 642.78, colorless powder, mp. 116-119 C (dec.), la) -15 (CHjOH). 

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