Three phenylethanoid glycosides (1, 2, 3) and one iridoid glycoside (4) were isolated from aerial parts of Veronica chamaedrys L. (Scrophulariaceae) for the first time. On the basis of spectral analysis, the structures of these compounds were determined to be acteoside (3,4-dihydroxy-β-phenylethoxy-O-α-L-rhamnopyranosyl-(1→3)-4-O-caffeoyl-β-D-glucopyranoside) (1), ehrenoside (3,4-dihydroxy-β-phenylethoxy-O-α-L-arabinopyranosyl-(1→2)-α-L-rhamnopyranosyl-(1→3)-4-O-caffeoyl-β-D-glucopyranoside) (2), chamaedroside (3,4-dihydroxy-β-phenylethoxy-O-α-L-rhamnopyranosyl-(1→3)-4-O-caffeoyl-α-L-arabinopyranoside) (3) and aucuboside (4).
The article presents data on the influence of flavonoid glycosides (FG) of Verbascum phlomoides L. on the viability of Streptomyces canosus CNMN-Ac-02 after lyophilization and long-term storage. As a result of the research, it was found that the addition of FG in concentrations of 0.005, 0.0005, 0.00005%/V to protective medium containing gelatin (2.5%) and glucose (7.5%), ensured a high viability of S. canosus CNMN-Ac-02 strain with 35.03-44.01% more than in control sample, after lyophilization and one year of storage. Rehydration of lyophilized strain after one year of storage using aqueous solutions of FG has shown a higher viability of S. canosus CNMN-Ac-02 strain compared to distilled water.
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