Flavonoids from Geranium robertianum

摘要

In continuation of research on phenolic compounds from representatives of the Geranium L. genus growing in Georgia, the aerial part (1.0 kg) of G. robertianum L. (Roberts geranium) was treated by the literature method [1]. A yellow solid precipitated from the purified aqueous liquid at room temperature. It was filtered off and recrystallized from pyridine to afford 1. Phenolic compounds were extracted from the mother liquor of 1 by ethylacetate. The total ethylacetate extract was chromatographed over a polyamide column (CH3OH:H2O eluent in various ratios). The enriched total extract and fractions of pure compounds were rechromatographed over a silica-gel:polyamide column to isolate 2-6.