Licoisoflavanone

Seven compounds, licoisoflavanone (66), licoisoflavone B (67), semilicoisoflavone B (68), gancaonin C (69), isoliquiritigenin (70), 6-prenyleriodictyol (71), and 8-prenyleriodictyol (72), Fig. (21), showed positive results in the rec-assay. Isoliquiritigenin (70) was most potent of the seven compounds (Table 7). 

About forty phenolic compounds have been isolated from the underground parts of G. aspera. The main phenolic compounds are liquiritin (110, 0.33%) and isoliquiritin (109, 0.20%), and the main phenols with isoprenoid substituent(s) are the isoflavonoids licoricidin (164, 0.056%), licorisoflavan A (165, 0.013%) and licoisoflavanone (192, 0.015%), the latter having been isolated earlier as a triacetate from an unidentified Xinjiang licorice (257). 

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