Page 49 - Pharmd general phytochemistry I-Final2024_LEUCTERS

- Steroidal glycosides : The aglycones are steroidal in nature.

- Sulphur-containing glycosides or thio-glycosides :The aglycones
contain sulphur.
- Alkaloidal glycosides : The aglycones are alkaloidal in nature.
- Coumarin glycosides : The aglycones are derivative
of benzo-α-pyrone.

OO

- Chromone glycosides : The aglycones are derivatives of benzo-γ
pyrone

O

O

Flavonoidal glycosides : The aglycones are derivatives
of 2-phenyl chromone.

(7)-According to the pharmacological activities:

Laxative glycosides, Cardiac glycosides,….

Hydrolysis of the Glycosides

1 Acid hydrolysis:(In the laboratory)

By heating with dilute acids genin + sugars

2 Enzymatic hydrolysis:
- The glycoside-bearing plants contain at the same time the specific

enzymes, but in different cells, thus glycosides are not acted upon by

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