Preparation, Toxicity, and Anti-Inflammatory Activity of Complexes of Uracil Derivatives with Polyfunctional Acids

Abstract

Uracil derivatives (6-methyluracil, 5-hydroxy-6-methyluracil) and polyfunctional acids (citrus pectin, oxidized fraction of citrus pectin, and 5-aminosalicylic acid) were shown to form rather stable 1:1 complexes, i.e., one uracil molecule for each carboxylic acid of the polyfunctional acid. Synthetic methods for these complexes were developed based on the results. Their toxicity and anti-inflammatory activity were studied. It was established that complexes of 6-methyluracil with the oxidized fraction of citrus pectin and of 5-hydroxy-6-methyluracil with 5-aminosalicylic acid possessed low toxicity and high anti-inflammatory activity.