Page 152 - PG 504-theoretical notes-phyto-1-2024-2025..

Clinical pharmacy PharmD program Third level Phytochemistry-1 (PG-504)

There are differences in the composition between the fresh plant and the dried drugs. In fresh vegetable,

anthracene-type compounds occur chiefly as glycosides of monomeric anthrones. During drying, two
transformation process occur: (1) oxidation, which leads to anthraquinone glycosides, and (2)

dimeization , which yields glycosides of dianthrone. Dimerization is an enzymatic reaction only
observed if drying is done at moderate temp. (40 C).

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