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Alkaloids of Terpenoid Origin

Only a few examples for alkaloids of terpenoid origin have been identified from arthropods. The ant Mommorium fiddi was shown to contain (2 ) and (2 2)-farnesylamine (148), which, surprisingly, constitutes the first identification of farnesylamine or any ofits derivatives in nature. The defensive agent actinidine (16) has been found in a number of insect species and probably derives from an iridoid precursor, although the details of actinidine biosynthesis in insects have not yet been fully clarified." ... [Pg.95]

Occasionally, plant alkaloids of terpenoid origin are sequestered by insects. For example, larvae of many species of sawfly are chemically protected by toxic metabolites they sequester from their host plants. This includes iridoid glycosides (see Section 2.04.3) and a group of steroidal alkaloids produced by plants of the genus Veratrum, such as zygadenine (149). In some cases, sawfly larvae have been shown to further metabolize sequestered Veratrum alkaloids for example, zygadenine is derived from hydrolysis of the ester functionalities in sequestered protoveratrine A (150). ... [Pg.95]

Alkaloids of Terpenoid Origin (excepting indole alkaloids and ergot alkaloids)... [Pg.668]

See other pages where Alkaloids of Terpenoid Origin is mentioned: [Pg.669]    [Pg.670]    [Pg.671]    [Pg.672]    [Pg.673]    [Pg.674]    [Pg.675]    [Pg.676]    [Pg.677]    [Pg.678]    [Pg.679]    [Pg.680]    [Pg.681]    [Pg.682]    [Pg.683]    [Pg.684]    [Pg.685]    [Pg.686]    [Pg.687]    [Pg.688]    [Pg.689]    [Pg.690]    [Pg.691]   


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Alkaloids terpenoid

Of terpenoid alkaloids

Terpenoid

Terpenoidal alkaloid

Terpenoides

Terpenoids

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