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2a-hydroxyursolic acid from

The configuration at C-2 of methyl 2-acetoxy-20/3-hydroxyursonate (162) from apple peel is a.121 Guaijavolic acid from the leaves of Psidium guaijava122 is identical with 2a-hydroxyursolic acid (163). The related triol (164) has been... [Pg.139]

Some resonances in the ursene series have been reassigned.The labelling pattern in ursolic acid and 2a-hydroxyursolic acid isolated from tissue cultures of Isodon japonicus fed with sodium [l,2- C]acetate conforms with the original Ruzicka hypothesis for the biogenesis of pentacyclic triterpenoids. [Pg.150]

New ursene derivatives include acuminatic acid (192) (2a,3a,19a-trihydroxy-urs-12-en-28-oic acid) from Pygeum acuminatum, 2a,3a,19a,23-tetra-hydroxyursolic acid (193) from the leaves of Coleus ambionicus, and... [Pg.212]

See other pages where 2a-hydroxyursolic acid from is mentioned: [Pg.130]    [Pg.130]    [Pg.1069]   
See also in sourсe #XX -- [ Pg.42 ]



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