1957 年 77 巻 9 号 p. 1038-1040
The presence of triterpenoidal substances was found in 11 kinds of plants belonging to Oleaceae family by the simple and direct test method of treating the dried leaf powder with acetic anhydride and conc. sulfuric acid in a watch glass. Further paper chromatographic treatment of the leaves of Jasminum odoratissimum L., developed with 4:1 mixture of benzene and xylene and 1:4 mixture of benzene and toluene, revealed the presence of two kinds of a triterpenoid. Thus, 10.5g. of crude triterpenoid was separated from 700g. of powdered leaf of J. odoratissimum and purification of the crude substance yielded two kinds of crystalline products of m. p. 302-303° and m. p. 278-279°. These were respectively identified as oleanolic acid and ursolic acid by the preparation of their derivatives, elemental analyses, infrared absorption spectra, and mixed fusion with authentic samples. This indicated that oleanolic acid is also contained in the Jasmimum species.