| Popis: |
Four novel complex isoflavones ulexones A, B, C and D, 5,7-dihydroxy-8-(3,3-dimethylallyl)-[6″,6″-dimethylpyrano (2″,3″:4′,3′)]-isoflavone, 5-hydroxy-[6″,6″-dimethylpyrano (2″,3″:4′,3′)] [6‴,6‴-dimethylpyrano (2‴,3‴:7,8)]-isoflavone, 5-hydroxy-[6″,6″-dimethylpyrano (2″,3″:4′,3′)] [1‴,2‴-dihydro-2‴-(1 -hydroxy-1 -methylethyl)-furano (4‴,5‴:7,8)]isoflavone, 5-hydroxy-[6″,6″-dimethylpyrano (2″,3″:4′,3′)] [6‴-methyl-6‴-(hydroxymethyl)-pyrano (2‴,3‴:7,8)]-isoflavone, have been isolated from the root bark of Ulex europaeus . Genistein and 5- O -methylgenistein were also present. Structures were established from the NMR spectra. |
