Abstract
The CH 2Cl 2/MeOH extract of the stem bark of Erythrina vogelii (Fabaceae) from Nigeria has yielded two novel isoflavones, 7,4′-dihydroxy-8-(γ,γ-dimethylallyl)-2″ ξ-(4″-hydroxy isopropyl)dihydrofurano[1″,3″:5,6]isoflavone (vogelin H) ( 1) and 7,4′-dihydroxy-8-[(2‴ ξ,3‴-dihydroxy-3‴-methyl)butyl]-2″,2″-dimethyl-3″,4″-dehydropyrano[1″,4″:5,6]isoflavone (vogelin I) ( 2), a novel flavone, 7,4′-dihydroxy-2″,2″-dimethyl-3″,4″-dehydropyrano[1″,4″:5,6]flavone (vogelin J) ( 3), and eight known flavonoids.
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