首次自茜草(Rubia cordifolia L.)中分离得到一新环烯醚萜甙-5-甲氧基京尼帕甙酸。作者从茜草的乙醇提取物的正丁醇萃取部分经硅胶柱层析,HPLC分离及甲基化物制备,得到一环烯醚萜化合物1及其甲基化物,通过UV,IR,FABMS,~1HNMR,~(13)CNMR,~1H-~1H COSY,~(13)C-~1H COSY,NOE光谱分析及双照射去偶实验,确定I为5-甲氧基京尼帕甙酸(5-Methoxy geniposidic acid),即1α,4aα,5β,7aα-1-(β-D-glucopyranosyloxy)-1,4a,5,7a-tetrahydro-5-methoxy-7-(hydroxymethyl)-cyclopenta[c]pyran-4-carb- A new iridoid-5-methoxygenipaic acid was isolated from Rubia cordifolia L. for the first time. The authors extracted the n-butanol from the ethanol extract of Valeriana officinalis by silica gel column chromatography, HPLC separation and methide preparation to give monocyclic ether ether compound 1 and its methide, by UV, IR, FABMS, ~1HNMR. , ~(13)CNMR, ~1H-~1H COSY, ~(13)C-~1H COSY, NOE Spectral Analysis and Dual Irradiation Decoupling Experiment to Determine I as 5-methoxygenipenamide (5- Methoxy geniposidic acid, namely 1α,4aα,5β,7aα-1-(β-D-glucopyranosyloxy)-1,4a,5,7a-tetrahydro-5-methoxy-7-(hydroxymethyl)-cyclopenta[c]pyran- 4-carb-