莱菔子是十字花科植物莱菔(Ruphanussativus L.)的种子。有消积、化痰之功。中医用来主治食积不化、咳逆痰多,痰饮气喘、腹疼泻痢等症。是我所痰饮丸方组成药物之一。有关莱菔子的化学成分据文献报道,含微量挥发油、脂肪油(约45%、为干性油,碘价100.8),另外含少量植物甾醇、正三十烷等。我们由石油醚提出物中以乙醇抽提、回收乙醇,置冰箱中析出一白色粒状结晶,经反复重结晶熔点72—3℃。除去白色结晶后的母液皂化,由不皂化部分分得一白色鳞片状结晶,反复重结晶后,熔点139—40℃。经与标准β-谷甾醇进行混合熔点测定。乙酰化衍生物的制 Radish seed is the seed of the cruciferous plant, Ruphanus sativus L. There is a product that eliminates product and eliminates waste. Traditional Chinese medicine is used to treat food indigestion, cough and sputum, phlegm and asthma, abdominal pain and diarrhea. It is one of the medicines that I have taken to drink pills. The chemical composition of Radix militaris is reported in the literature, containing a trace amount of volatile oil, fatty oil (about 45%, as a dry oil, iodine value of 100.8), in addition to a small amount of phytosterols, n-triacontane and so on. We extracted ethanol from the petroleum ether and extracted ethanol, and precipitated a white granular crystal in the refrigerator. The melting point was 72–3°C after repeated recrystallization. The saponification of the mother liquor after removal of the white crystals is obtained by dividing the white flaky crystals from the unsaponifiable portion, and after repeated recrystallization, the melting point is 139 to 40°C. The melting point was determined by mixing with standard β-sitosterol. Acetylated derivatives