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Alkaloids
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9. (a) Biosynthetic Classification - alkaloids are produced in
the plant biosynthetically. all alkaloids having been derived
from the same precursor but possessing different taxonomic
distribution and pharmacological activities.
Examples
(i) Indole alkaloids derived from tryptophan.
(ii) Piperidine alkaloids derived from lysine.
(iii) Pyrrolidine alkaloids derived from ornithine.
(iv) Phenylethylamine alkaloids derived from tyrosine.
(v) Imidazole alkaloids derived from histidine.