Abstract
Fraxin or fraxetin is present in the bark of Fraxinus ornus L. or F. excelsior L., growing in Europe. In Fraxinus Sieboldiana Bl., F. japonica Bl., F. pubinervis Bl., and F. sambucina Koidz., growing in Japan, the present worker obtained aesculetin without exception (This Journal: 58, 185 (1938); 60, 200 (1940)). The presence of aesculetin was confirmed in plants other than the above, such as Fraxinus intermedia Nakai (I), F. Spaethiana L. (II), F. Sieboldiana Bl. var. augustata Bl. (III) and F. kantoensis Koidz. (IV). It was also found that fraxetin was present with aesculetin in (I)., The glycoside, aesculin, was also obtained in good yield from F. Sieboldiana Bl., from which only aesculin had been confirmed previously (loc. cit.). It is assumed that aesculetin, which had been found from other plants, was present in the living plants as its glycoside, aesculin.
