Kirakosyan, V. G.; Vardapetyan, S. M.; Varderesyan, L. H.; Tsaturyan, A. H. DEVELOPMENT OF A RAPID AND EFFICIENT METHOD FOR QUANTITATIVE DETERMINATION OF N-NITROSODIMETHYLAMINE IMPURITY BY HIGH-PERFORMANCE LIQUID CHROMATOGRAPHY IN METFORMIN HYDROCHLORIDE, LOSARTAN POTASSIUM, VALSARTAN AND RANITIDINE MEDICINAL RAW MATERIALS AND ITS PRODUCTS. Proc. YSU B: Chem. Biol. Sci. 2021, 55, 296-299.