Page 105 - phytochemistry I - PharmD Clinical

3- Sulphur containing compounds:

Sulphides occur quite frequently in plants, propably in the form of
glycosides which are decomposed by the process of distillation.
1. Hydrogen sulphide (H2S): It occurs as a decomposition product of anise
and caraway oils during distillation.

2. Carbon disulphide (CS2): It occurs as a decomposition product of
mustard oil.

3. Dimethyl sulphide (CH3)2S: It occurs as a decomposition product of
American peppermint oil and must be removed by rectification in order to
improve the odor of the oil.

4. Diallyl disulphide: Occurs in oil of onion and oil of garlic.

5. Allylisothiocyanate: CH2=CH-CH2-N=C=S
Source:
It occurs in glycosidal combination as sinigrin in the seeds of black
mustard.

Uses:

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