Acta Pharmaceutica Sinica B 2017;7(6):638-646

doi:10.1016/j.apsb.2017.09.006

8,4'-Oxyneolignane glucosides from an aqueous extract of "ban lan gen" (root) and their absolute configurations.

Lingjie MENG 1 ; Qinglan GUO 1 ; Yufeng LIU 1 ; Jiangong SHI 1

Affiliations

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Keywords

8,4′-Oxyneolignane; Absolute configuration; Cotton effect; Cruciferae; Isatioxyneolignosides A−F; Isatis indigotica; Threo/erythro Isomers; ΔδC8-C7 value

Country

China

Language

English

Abstract

Three pairs of glycosidic 8,4'-oxyneolignane diastereoisomers, named isatioxyneolignosides A-F (-), were isolated from an aqueous extract ofroots. Their structures and absolute configurations were elucidated by comprehensive spectroscopic data analysis and enzyme hydrolysis. The validity of Δvalues to distinguishandaryl glycerol units and Cotton effects at 235±5 nm to determine absolute configurations at C-8 in-and their aglycones (-) are discussed.