isoflavan
Isoflavan is a class of flavonoid compounds within the larger isoflavonoid family. It refers to the dihydro derivatives of isoflavones, in which the C-ring of the flavonoid skeleton is saturated at the 2-3 bond, giving a 2,3-dihydro-1-benzopyran framework with a phenyl substituent at the appropriate position. Isoflavans occur in various plant species, particularly legumes, though they are less widely distributed than their isoflavone precursors. They are typically found in trace to moderate amounts in seeds, roots, and leaves and may be produced biosynthetically from isoflavones through enzymatic reduction.
Biological activity of isoflans has been investigated in the context of flavonoids. They may exhibit antioxidant
Because of structural similarity to other flavonoids, isoflans are often grouped with isoflavones and other isoflavonoids