在石斛之化學成分考察部分，依文獻，將世界各地已完成的石斛 屬植物之化學成分研究，依其結構類別分為 24 類，統計的結果共有 199 種化合物。
在實驗部分，三星石斛的成分分析結果如下：
三星石斛之莖的正己烷抽出物經管柱層析分離，低極性(100﹪正 己烷)部分在經 GC, GC/MS 分析鑑定，主要為長鏈烷類化合物：18 個碳至 29 個碳的直鏈烷；此外還有烯類：heptene、octene、undecene、
eicosene、nonacosene；脂肪酸：hexadecanoic acid、heptadecanoic acid、
octadecanoic acid；和 herbertene、calamene、dibutyl phthalate、dioctyl phthalate、alloaromadendrene。10﹪正己烷/乙酸乙酯沖出部分經進一 步管柱層析分離得到 2,3,4,7-tetramethoxyphenanthrene、hexacosanol、
stigmast-4-en-3-one。20﹪正己烷/乙酸乙酯沖出部分經進一步管柱層 析分離得到 phytosterol。
三星石斛之莖的乙酸乙酯抽出物經管柱層析分離，在 100﹪正己 烷沖出部分得到 heptacosane；10﹪正己烷/乙酸乙酯沖出部分經進一 步管柱層析分離得到 stigmast-4-en-3-one。
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