Flavones ofMentha piperita of variety Kubanskaya 6

Abstract

acetate of (III) (CDCI3), in comparison with the spectrum of the initial (III), showed the signals of two acetoxy groups. The UV spectra with diagnostic additives showed the presence of OH groups at C5 (36-nm shift due to sodium acetate) and C~' (50-nm shift due to sodium methanolate). No bathochromic shift of the band of (III) was observed in the presence of boric acid (ortho-dihydroxy grouping absent). In the presence of aluminum chloride with the addition of hydrochloric acid, the shift of the band of (III) was 26 nm, which is character- istic for a 5 hydroxyflavone having an oxygen-containing function in position 6.