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김창민(Chang Min Kim),U. Sankawa(U. Sankawa),Y. Ebizuka(Y. Ebizuka) 한국생약학회 1987 생약학회지 Vol.18 No.1
A new isoflavanone, echinoisosophoranone mp 185∼7˚ has been isolated from the underground parts of Echinosophora koreensis Nakai (Leguminosae). The structure of echinoisosophoranone was identified as 5, 4`-dihydroxy-5`-(α, α-dimethylallyl)-7, 2`-dimethoxy isoflavanone on the basis of spectroscopic studies.
김창민(Chang Min Kim),Y. Ebizuka(Y. Ebizuka),U. Sankawa(U. Sankawa) 한국생약학회 1987 생약학회지 Vol.18 No.1
A. further investigation of the flavonoid constituents of the underground parts of Echinosophora koreensis Nakai(Leguminosae) has yielded a new isoflavonoid, mp 194∼7˚, together with the known dihydroflavonol, sophoronol, mp 104∼8˚, The new isoflavonoid was identified as 3, 5, 7-trihydroxy-2`, 4`-dimethoxy - 3` - isopentenylisoflavanone on the basis of spectroscopic means. The latter previously reported as 2[(5`-methoxy-2`, 2`-dimethyl-2H-benzopyran)6`-yl]-3, 5, 7-trihydroxychroman- 4 -one should be revised to 3-[(5`-methoxy-2`, 2`-dimethyl-2H-benzopyran)- 6` -yl)-3, 5, 7-trihydroxychroman-4-one by spectral data.