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Paper | Regular issue | Vol 29, No. 9, 1989, pp.1761-1772
Published online, 1st January, 1970
DOI: 10.3987/COM-89-5041
Structures of Six Isoprenoid-substituted Flavonoids, Gancaonins F, G, H, I, Glycyrol, and Isoglycyrol from Xibei Licorice (Glycyrrhiza Sp.)

Toshio Fukai, Qing-Hua Wang, Taro Kitagawa, Kazunao Kusano, Taro Nomura,* and Yoichi Iitaka

*Faculty of Pharmaceutical Sciences, Toho University, 2-2-1, Miyama, Funabashi, Chiba 274-8510, Japan

Abstract

Four new isoprenoid-substituted flavonoids, gancaonins F, G, H, and I, along with two known compounds, glycyrol and isoglycyrol, were isolated from the Xibei licorice (Glycyrrhiza sp.). Structures of gancaonins F, G, H, and I were shown to be 3-6, respectively, on the basis of spectral evidence. From the X-ray crystalloqraphic analysis, spectroscopic data, and chemical evidence, the structures 1” and 2’ for isoglycyrol and glycyrol should be revised to the structures 1 and 2, respectively.