忽布及び麦酒苦味質に関する研究 (第5報) : 麦酒新苦味質成分フラクションcについて

概要

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The configuration of crystalline fraction c (fr. c) which had previously been isolated from beer, was investigated in comparison with that of oily isohumulones.Based on the consistency or close resembrance in the reaction with coloration reagents, pK- value, distribution coefficients in the pattern of countercurrent distribution and ultraviolet and infra-red absorption spectra, fr. c was supposed to bear a close relation to isohumulones. Moreover, the degradation products of isohumulones and of fr. c through hydrolysis or ozonolysis coincided with each other, and the results of elementary analysis indicated that fr. c had the same molecular formula as that of isohumulones.Accordingly, the author concluded that fr. c was a isomeric substance of isohumulones. Fr. c was shown to be levulorotartory while isohumulones was dextrorotary in ethylacetate, so the both bitter substances seemed to be optical isomers.
社団法人日本生物工学会の論文
1961-10-15