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Three minor flavonoids, licofuranocoumarin, isotrifoliol and glisoflavanone, were isolated from licorice (underground part of Glycyrrhiza uralensis), and their structures with 3-arylcoumarin, coumestan and isoflavanone skeletons were respectively elucidated on the basis of spectroscopic data.
Three new C-glycosidic flavonoids, cassiaoccidentalins A, B and C, were isolated from aerial parts of Cassia occidentalis, and their structures with a 3-keto sugar were established on the basis of spectroscopic and chemical evidence. They showed signals of two conformers in their 1 H- and 13 C-NMR spectra due to hindered rotation around their C-glycosidic linkages, and the conformations...
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