Abstract: Esterified ephedrine derivatives with prolonged antiulcer activity and low toxicity, having the following general formula: ##STR1## in which R is: ##STR2## The invention also describes a process for preparing derivatives of formula (I) and compositions containing them as active principle.
Abstract: Methylated chitosans are used for the preparation of pharmaceutical compositions having improved laxative properties over commonly used laxative.Said products are advantageouisly employed also in the preparation of ophtalmic solutions.
Abstract: Chitosan derivatives in the form of coordinated complexes with ferrous ions in which coordinated bonds are established between the ferrous ion and the amino group and hydroxyl group present respectively in position 2 and position 3 of the chitosanglucosamine ring.Said chitosan derivatives are soluble in an aqueous medium and are able to release iron into the gastrointestinal tract in a controlled manner.
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