Pterocarpan

Pterocarpans are derivatives of isoflavonoids found in the family Fabaceae. It is a group of compounds which can be described as benzo-pyrano-furano-benzenes (i.e. 6H-[1]benzofuro[3,2-c]chromene skeleton) which can be formed by coupling of the B ring to the 4-one position.

2'-hydroxyisoflavone reductase is the enzyme responsible for the conversion in Cicer arietinum and glyceollin synthase for the production of glyceollins, phytoalexins in soybean.

Known compounds

 * Bitucarpin A and B, isolated from the aerial parts of Mediterranean plants Bituminaria morisiana and Bituminaria bituminosa
 * Erybraedin A and B, isolated from the stems of Erythrina subumbrans and C, isolated from the leaves of Bituminaria morisiana
 * Erythrabyssin II, erystagallin A, erythrabissin-1, and erycristagallin isolated from the stems of Erythrina subumbrans
 * Glycinol, glyceollidin I and II, glyceollins (glyceollin I, II, III and IV), found in the soybean (Glycine max)
 * Glycyrrhizol A, isolated from the root of the Chinese licorice plant (Glycyrrhiza uralensis)
 * Maackiain, isolated from the roots of Maackia amurensis subsp. Buergeri
 * Medicarpin, found in Medicago truncatula
 * Morisianine, isolated from the seeds of Bituminaria morisiana
 * Orientanol A, isolated from the wood of Erythrina orientalis
 * Phaseolin, found in French bean seeds
 * Pisatin, found in Pisum sativum
 * Striatine, isolated from aerial parts of Mundulea striata
 * Trifolirhizin, found in Sophora flavescens