薏苡自古以來就是藥食兼用的穀類，常用為藥膳或食療的材料，在近代科學的研究中，也顯示薏苡具有抗腫瘤、降血脂、調節免疫力、降血糖等功效。本論文以薏苡種皮為研究材料，進行成分分離鑑定，期望找出薏苡的有效機能性成分。
薏苡種皮以各種層析法分離純化，並利用各種光譜分析法進行鑑定，結果從薏苡種皮的甲醇萃取物中，分離出十六種純化合物，其中一種為新化合物。在十六種化合物中，除長鏈酸、酯和醇類化合物外，主要為類固醇和酚類化合物。類固醇類化合物有stigmasterol、β-sitosterol、b-sitosterone、cycloart-23(Z)-ene-3β，25-diol和3-β-hydroxystigmast-5-en-7-one，酚類化合物有vanillin、4-hydroxybenzaldehyde、6-methoxy-3H-benzoxazol、4-hydroxy-3,5-dimethoxybenzaldehyde、vanillic acid和4-hydroxyacetophenone。另外在20-30％乙酸乙酯-正己烷部分分離出的coixamide，鑑定為新的化合物。

Adlay is traditionally consumed as a cereal for both meal and medical uses in China. Recent researches suggest that adlay may affect human health by antitumorgenesis, improving immune response, lowering serum cholesterol and blood sugar, etc. The purposes of this study were for isolation and identification the compounds from oil-soluble adlay testa extract.
The methanol extract of oil-soluble adlay testa extract was separated and isolated using various chromatographies to obtain sixteen compounds, and one of these compounds is a new compound. Addition to long chain fatty alcohol、acid and ester, the most are steroids and phenols of seventeen compounds. The steroids of these compounds are stigmasterol、β-sitosterol、b-sitosterone、cycloart-23(Z)-ene-3β，25-diol and 3-β-hydroxystigmast-5-en-7-one. The phenols of these compounds are vanillin、4-hydroxybenzaldehyde、6-methoxy-3H-benzoxazol、4-hydroxy-3,5-dimethoxybenzaldehyde、vanillic acid and 4-hydroxyacetophenone.One of these compounds identified as coixamide is a new compound.

壹、前言1
貳、文獻整理2
一、薏仁簡介2
二、薏苡之食療功能與其特殊生理機能性3
三、有關薏苡分離出的成分4
參、材料與方法12
（一）實驗藥品與器材12
1. 原料來源12
2. 藥品12
3. 器材13
（二）實驗方法14
1.實驗流程14
2.原料製備14
3.萃取物的純化與分析14
4. 光譜儀器17
肆、結果與討論18
一、薏苡種皮油溶性萃取物分離結果18
二、化合物摘要19
三、化合物之分析與鑑定24
四、化合物的討論84
伍、參考文獻86

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