dihydroxy alcohol 中文意思是什麼
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Two kinds of flavonoids in water extracts, water - extraction and alcohol precipitation, alcohol extracts were found by paper chromatography. they were separated and purified by thin - layer chromatography, one of which was primarily identified by uv as 4 ", 5 - dihydroxy - flavonol etherification or 4 ", 5, 8 - trihydroxy - flavonol etherification
水提物、水提醇沉物、醇提物等3種提取物紙層析結果顯示有兩種黃酮類化合物，經薄層層析分離純化，並進行紫外光譜分析，初步測定其中一組分為4 ， 5 -二羥基黃酮醇醚或4 ， 5 ， 8 -三羥基黃酮醇醚。
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