8,4'-Oxyneolignane glucosides from an aqueous extract of "ban lan gen" (Isatis indigotica root) and their absolute configurations
Three pairs of glycosidic 8,4'-oxyneolignane diastereoisomers, named isatioxyneolignosides A−F (1-6), were isolated from an aqueous extract of Isatis indigotica roots. Their structures and absolute configurations were elucidated by comprehensive spectroscopic data analysis and enzyme hydrolysis...
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| Main Authors: | , , , |
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| Format: | Book |
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Elsevier,
2017-11-01T00:00:00Z.
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| Summary: | Three pairs of glycosidic 8,4'-oxyneolignane diastereoisomers, named isatioxyneolignosides A−F (1-6), were isolated from an aqueous extract of Isatis indigotica roots. Their structures and absolute configurations were elucidated by comprehensive spectroscopic data analysis and enzyme hydrolysis. The validity of ΔδC8-C7 values to distinguish threo and erythro aryl glycerol units and Cotton effects at 235±5 nm to determine absolute configurations at C-8 in 1-6 and their aglycones (1a-6a) are discussed. |
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| Item Description: | 2211-3835 2211-3843 10.1016/j.apsb.2017.09.006 |