文章基本信息

标题：Studies on the Constituents of Rice Bran Oil. I. Isolation of Phenolic Substances.
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作者：Masao Shimizu ; Genkichi Ohta ; Shinichi Kitahara 等
期刊名称：Chemical and Pharmaceutical Bulletin
印刷版ISSN：0009-2363
电子版ISSN：1347-5223
出版年度：1957
卷号：5
期号：1
页码：36-39
DOI：10.1248/cpb1953.5.36
出版社：The Pharmaceutical Society of Japan
摘要：Tsuchiya and Kaneko¹⁾ had isolated a substance exhibiting ultraviolet absorption maxima (in heptane) at 231, 290, and 315mμ from rice bran oil and named it oryzanol. Utilizing the fact that oryzanol is a phenolic substance, the rice bran oil removed of free fatty acids by sodium carbonate in dichloroethane solution was passed through an alumina column and the adsorbed phenolic substance was eluted. This phenolic substance, as an ether solution, was purified by transiting to potassium hydroxide solution and further recrystallized to crystalline oryzanol. This was acetylated and fractionally recrystallized from ethyl acetate, separating into three kinds of substances. The most sparingly soluble portion was in a minute amount but the other two liberated phenolic substances on deacetylation. These were designated as oryzanol-A and -B.