Abstract
The aim. The genus Veronica (Veronica L.), family Plantaginaceae Juss. in the flora of Ukraine is represented by 64 species; Veronica chamaedrys L. and Veronica teucrium L. are widespread in the Kharkiv region. Plants are used in folk medicine as expectorants, anti-inflammatory, diaphoretic, anti-allergic, choleretic, antispasmodic, anticonvulsant, diuretic, sedative, wound healing and antibacterial agents. The aim of this work was to study the carboxylic acids of flowers and leaves of Veronica chamaedrys L. and flowers and leaves of Veronica teucrium L. Materials and methods. The objects of the study were flowers and leaves of Veronica chamaedrys L. and Veronica teucrium L., harvested in the flowering phase in 2018 in Kharkiv region, Ukraine. The study of carboxylic acids was performed by chromatography-mass spectrometry on a 6890N MSD/DS Agilent Technologies chromatograph with a 5973N mass spectrometric detector. Identification of acid methyl esters was performed using data from the mass spectrum library NIST 05 and Willey 2007 in combination with programs for the identification of AMDIS and NIST; also compared the retention time with the retention time of standard compounds. Results. In the flowers and leaves of Veronica teucrium L. 35 carboxylic acids were identified, the total content of which is 5.55 % and 2.93 %, respectively. 31 and 32 carboxylic acids were identified in the flowers and leaves of Veronica chamaedrys L., their total content is 5.39 % and 7.45 %, respectively. Conclusions. It is established that the flowers and leaves of Veronica chamaedrys L. are characterized by a higher content of carboxylic acids compared to the flowers and leaves of Veronica teucrium L. As chemotaxonomic markers of flowers and leaves the following compounds can be used: α-furanic acid for Veronica chamaedrys L.; veratric, 4-hydroxybenzylacetic and syringic acids for Veronica teucrium L. The obtained results will be the basis for further chemotaxonomic studies
Highlights
The genus Veronica (Veronica L.) of the family Plantaginaceae Juss. is widespread and represented in the world flora with more than 300 species [1, 2]. 64 wild species grow on the territory of Ukraine and are cultivated as fodder and ornamental plants, have many varieties and hybrids, which differ mainly in the size of inflorescences and colour of flowers [3]
The obtained results allow us to consider the leaves of Veronica teucrium as a more promising raw material for the development of substances and study of their effects on the metabolic syndrome
The composition of carboxylic acids of flowers and leaves of Veronica chamaedrys and Veronica teucrium was first studied by chromatophy-mass spectrometry
Summary
The genus Veronica (Veronica L.) of the family Plantaginaceae Juss. is widespread and represented in the world flora with more than 300 species [1, 2]. 64 wild species grow on the territory of Ukraine and are cultivated as fodder and ornamental plants, have many varieties and hybrids, which differ mainly in the size of inflorescences and colour of flowers [3]. Is widespread and represented in the world flora with more than 300 species [1, 2]. The herb is used, much less often the flowers or rhizomes of both Veronica species as expectorant, anti-inflammatory, diaphoretic, antiallergic, choleretic, antispasmodic, anticonvulsant, diuretic, sedative, wound healing and antibacterial agents [4]. Experimental studies of the activity of substances from the herb Veronica teucrium L. were done. Anti-inflammatory activity is positively correlated with the content of phenolic compounds, in particular baicalein, quercetin, hyperoside, isoquercetin, chlorogenic acid [5, 6]. It was found that antibacterial activity against S. aureus and E. coli is shown by aqueous extracts containing free polyphenols, hydroxycinnamic acids and extracts containing the sum of iridoids [7, 8]
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