**4.4 Isoflavonoids**

The diverse type structure of isoflavonoids was synthesized from flavanone, which have been reported several plants as corylifol A, neobavaisoflavone, and irisflorentin from *Cytisus striatus* [77], formoninetin and biochanin A from *Hylastinus obscurus* [78]. One new leptoisoflavone A (a rare 5-membered dihydrofuran ring) from *Limonium leptophyllum* [79], 2,2′-trimethoxy-6,8-dihydroxy-isoflavone from the ethanol extract of *Thespesia populnea* bark [80] and isoflavones, genistein and daidzein from *Hericium erinaceum* (**Figure 9**) [81].
