Abstract: | Two coumarin glycosides have been isolated from an aqueous ethanolic extract of the epigeal part ofHaplophyllum obtusifolium: (I) — C16H16O10, mp 164–166°C, α]D ?52.4° (dimethylformamide); and (II) — C26H26O12, mp 206–208°C, α]D ?110.5° (pyridine). It has been established on the basis of chemical transformations and spectral characteristics that (I) has the structure of fraxetin 7-O-β-D-glucopyranoside and (II) that of scopoletin 7-O-(6′-O-feruloyl-β-D-glucopyranoside). |