Page 118 - phytochemistry I - PharmD Clinical

7. Classification according to the correlation to the parent natural
glycoside
The natural parent glycoside is referred to as the primary glycoside.
While, the secondary glycoside is obtained through the elimination
of one monosaccharide unit from this parent glycoside; and that
which is given after the elimination of two monosaccharide units is
called the tertiary glycoside ... and so on.

8. Classification according to the plant families

For example; Coniferous glycosides (glycosides of the family
Coniferae), Liliaceous glycosides (glycosides of the family
Liliaceae) ... etc.

Alcoholic and Phenolic Glycosides

This class of glycosides is characterized by a phenol moiety combined
with a sugar. They are commonly found as plant metabolites. Alcoholic
and phenolic glycosides occur to a greater or lesser extent in most parts
of plant, and the majority of naturally occurring glycosides are phenolic
derivatives.

1. Salicin

Salicin is an alcoholic glycoside obtained from Salix purpurea, Salix
fragilis and Salix alba (white willow). Emulsin is the enzyme responsible
for the hydrolysis of salicin to saligenin (salicyl alcohol) and glucose.

Chemical structure and hydrolytic products:

• Enzymatic hydrolysis

• Acid hydrolysis

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