Page 66 - PG 504-theoretical notes-phyto-1-2024-2025..

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

 Phytic acid

• The hexaphosphoric ester of inositol.

2+
2+
• Forms insoluble salts with Ca , Mg , Fe & Cu , Prevent their absorption
2+
2+
from diet in the small intestine.
• So it is better to avoid maize and legumes in diet of anaemic patient with

iron rich diet or haematinic drugs.

2) Acidic sugars:

There are three important types of acidic sugars: (see above)

a) Aldonic acids: (see above)

▪ They are obtained by oxidation of the carbonyl group.

Ascorbic acid “Vitamin C”: (Enol form).

CH 2 -OH

HO-CH O
O

OH OH

Preparation:

1) It could be extracted from citrus fruits, sore hips, blackcurrants.

2) Chemical synthesis from glucose.

3) Vitamin C (L-ascorbic acid) is an important aldonic acid lactone.

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