Five new iridoid glycosides were isolated by chromatographic separation of extracts from the roots of three Gentiana species (Gentianaceae) growing in Eastern Siberia. Their structures were elucidated by spectral methods as 2′-O-(2′′-hydroxy-3′′ -O-β-D-glucopyranosyloxybenzoyl)swertiamarin (gentiridoid A), 2′-O-(2′′-hydroxy-3′′-O-β-D-glucopyranosyloxybenzoyl)gentiopicroside (gentiridoid B), and 3′,6′-di-Oacetyl-4′-O-(2′′,3′′-dihydroxybenzoyl)swertiamarin (gentiridoid C) from G. decumbens L. f.; 2′,3′,6′-tri-Oacetyl-4′-O-[2′′-hydroxy-3′′-O-(6′′′-O-β-D-glucopyranosyl)-β-D-glucopyranosyloxybenzoyl]swertiamarin (gentiridoid D) from G. dahurica Fisch.; and loganic acid 6′-O-(6′′ -O-β-D-glucopyranosyl)-β-Dglucopyranoside (gentiridoid E) from G. macrophylla Pall.
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Acknowledgment
The studies were supported by the Ministry of Education and Science of the Russian Federation (Projects Nos. 121030100227-7 and FSRG-2020-0019) and the RFBR (Project No. 19-09-00361).
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Translated from Khimiya Prirodnykh Soedinenii, No. 4, July–August, 2021, pp. 574–580.
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Olennikov, D.N., Chirikova, N.K. New Compounds from Siberian Gentiana Species. I. Iridoid Glycosides. Chem Nat Compd 57, 673–680 (2021). https://doi.org/10.1007/s10600-021-03448-1
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DOI: https://doi.org/10.1007/s10600-021-03448-1