Soyasaponins from Soybean Flour Medium for the Liquid Culture of Ganoderma applanatum

作者：Lee So Young; Kim Ju Sun; Shim Sang Hee; Kang Sam Sik^*

来源：Bulletin of the Korean Chemical Society, 2011, 32(10): 3650-3654.

DOI：10.5012/bkcs.2011.32.10.3650

• Ganoderma applanatum
• Soyasaponins
• Liquid culture
• Soybean flour

Two new unusual soyasaponins named 6 ''-O-methyldehydrosoyasaponin I (7) and desglucosylsoyasaponin A(1) (10) along with eight known saponins, dehydrosoyasaponin IV (1), dehydrosoyasaponin Ill (= impatienoside A) (2), soyasaponin III (3), dehydrosoyasaponin II (= soyasaponin Bg) (4), soyasaponin II (5), dehydrosoyasaponin I (= soyasaponin Be) (6), soyasaponin I (8), and kudzusaponin SA(3) (9), were isolated as their methyl esters and identified from the liquid culture of G. applanatum. Their structures were determined by chemical and spectroscopic analyses including 1D- and 2D-NMR as well as by comparison of their spectroscopic data with those of the reported in literatures. Although dehydrosoyasaponin IV was identified by LC-MS/MS method from soy protein isolate, this is the first report of the isolation of this compound. Dehydrosoyasaponin III (2) and kudzusaponin SA(3) (9) were also isolated for the first time from soybean. The presence of soyasaponins in Ganoderma species seems to be unusual feature. Thus, we presumed that compounds 1-10 might all be derived from the defatted soybean flour which was added to the culture medium as a nitrogen source.

• 出版日期2011-10-20