Abstract
The search for additional sources of catechins among the local flora is relevant today. The method for determining the content of catechins by the spectrophotometric method in the leaves of the subshrub Zalesov's cinquefoil (Comarum salesovianum (Steph.) Asch. et Graebn.) from the Rosaceae Juss. family was validated. The content of catechins in terms of (±)-catechin in the leaves and rhizomes of two species of the genus Comarum ‒ C. salesovianum and C. palustre L. (marsh cinquefoil) was studied. The highest content of catechins was found in the roots of C. palustre (4%) and leaves of C. salesovianum (2.58%). A method for determining the composition and content of individual catechins in the leaves and roots of two representatives of the genus Comarum by high-performance liquid chromatography has been proposed. Three catechins [(±)-catechin, epigallocatechin gallate and (-)-epicatechin] were found in leaves and roots. (±)-catechin and (-)-epicatechin are predominant in the leaves and roots of C. palustre and C. salesovianum. The content of epigallocatechin gallate does not exceed 0.1 mg/g. The concentration of (±)-catechin is highest in the roots (1.21 mg/g) of C. palustre, and (-)-epicatechin is highest in the leaves (1.35 mg/g) of C. salesovianum.
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