DPPH

Alcohol-water extracts of Thymus vulgaris have obtained by ultrasonic extraction method for different times extraction. The obtained extracts have been tested for the quantitative content of extractive substances, phenolic compounds and flavonoids and for the presence of antioxidant activity. The best studied indicators were found in extract obtained by ultrasound extraction for 40 minutes (content of extractive substances 25 mg / ml, sum of polyphenolic compounds 30 mg / ml, flavonoids content 45 mg / ml).

The antioxidant activity of novel N3 and C6 substituted 5,7-dimethyl-3H-thiazolo[4,5-b]pyridine-2-one derivatives was evaluated in vitro by the method of scavenging effect on 2,2-diphenyl-1-picrylhydrazyl (DPPH) radicals. The correlation analysis between the antioxidant activity and different subsets molecular descriptors was carried out for 19 compounds.