Biosynthesis of isoflavonoid phytoalexins in Medicago sativa: the biosynthetic relationship between pterocarpans and 2′-hydroxyisoflavans

Abstract

Demethylhomopterocarpin (1) and vestitol (8) are interconvertible in CuCl₂-treated lucerne seedings, but they appear to be synthesised simultaneously from a common intermediate; sativan (9) is probably derived by the methylation of vestitol.