从莶（ＳｉｅｇｅｓｂｅｃｋｉａｏｒｉｅｎｔａｌｉｓＬ）的地上部分，分离出八个化合物，其中Ｉ和Ｉ根据理化性质和光谱数据确定其结构为ｅｎｔ１７ａｃｅｔｏｘｙ１８ｉｓｏｂｕｔｙｒｙｌｏｘｙ１６（α）ｋａｕｒａｎ１９ｏｉｃａｃｉｄ（Ｉ）和ｅｎｔ１７ｅｔｈｏｘｙ１６（α）ｋａｕｒａｎ１９ｏｉｃａｃｉｄ（ＩＩ），均为新化合物，分别被命名为莶酯酸（ｓｉｅｇｅｓｅｓｔｅｒｉｃａｃｉｄ，Ｉ）和莶醚酸（ｓｉｅｇｅｓｅｔｈｅｒｉｃａｃｉｄ，Ｉ）。其余化合物分别鉴定为腺梗莶萜醇酸（ｅｎｔ１６β，１７ｄｉｈｙｄｒｏｘｙｋａｕｒａｎ１９ｏｉｃａｃｉｄ，ＩＩ），奇任醇（ｋｉｒｅｎｏｌ，ＩＶ，β谷甾醇葡萄糖甙（βｓｉｔｏｓｔｅｒｏｌｇｌｕｃｏｓｉｄｅ，Ｖ），二十一醇（ｈｅｎｅｉｃｏｓａｎｏｌ，ＶＩ），花生酸甲酯（ｍｅｔｈｙｌａｒａｃｈｉｄａｔｅ，ＶＩＩ）和β谷甾醇（βｓｉｔｏｓｔｅｒｏｌ，ＶＩＩ）。除奇任醇和β谷甾醇外，均为首次从该植物中分得。 From the aerial parts of Siegesbeckia orientalis L, eight compounds were isolated, and I and I were determined according to their physicochemical properties and spectral data. Their structures were ent17acetoxy18isobutyryloxy16(α)kauran19 Oicacid(I) and ent17ethoxy16(α)kauran19oicacid(II) are new compounds and are named as siegesesteric acid (I) and siegesetheric acid, respectively. , I). The remaining compounds were identified as gent 16 and 17dihydroxy kauran19oicacid II, respectively, and kirenol, IV, βsitosterol glucoside, V ), Heneicosanol (VI), methylarachidate (VII), and β-sitosterol (VII), except for querenol and β-sitosterol In the points.