Continuing a study of the flavonoid composition [1] of succulents of the family of Crassulaceae, by paper chromatography we have found no less than 14 substances of flavonoid nature in the epigeal part of Sempervivum ruthenieum. By preparative chromatography on polyamide, we have isolated two individual substances (I and II). Substance I, CisH1006, has mp 330-331°C. UV spectrum: Ama x 350, 253 nm, XC~COONa 382, 269 rim. The IR region of the spectrum has absorption bands characteristic for flavones at 3200-3300 cm-1 (OH groups) and 1665 cm-i (oz, f~-unsaturated CO group) [2]. The acetate of I has mp 226-227°C. Substance II, C15H1007, mp 310-312°C. IR spectrum: 3300 cm-1 (OH groups), 1665 cm-1 (o~,fl-unsaturated CO group) ; mp of the acetate 199-201°C. From its physicochemical properties, the properties of the acetyl derivatives, and the results of chromatographic studies with authentic samples, substance I was identified as 3 ,5 ,7 ,4 '-tetrahydroxyflavone (kaempferol) and substance II as 3,5,7,3' ,4'-pentahydroxyfiavone (quercetin).
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