Abstract Eclipta prostrata (Linn.) (Family: Asteraceae) is an important Indian medicinal herb having myriad therapeutic potential. In the present study, the essential oil was extracted from the aerial parts of E. prostrata collected from 10 different regions of Odisha by hydro-distillation and analyzed by using one- dimensional gas chromatography coupled with mass spectrometry (GC/MS). Fifty nine volatile compounds comprising 68.84-96.58% of the total oil were identified. Sesquiterpene hydrocarbons were the predominant group of compounds which varied from 26.84-62.67% followed by monoterpene hydrocarbons (28.93-38.66%). The E. prostrata oils were rich in α-pinene (11.2 - 18.23%) followed by caryophyllene (8.56 - 15.38%), α- humulene (1.8-11.1%), α-pinene (2.6 - 8.72%), camphene (2.6 - 8.5%), allo-aromadendrene (2.5 - 6.99%), α-amorphene (0.3 - 7.8%), cis-muurole-4(14),5-diene (1.2 - 5.7%), eugenol (2.13 - 4.1%) followed by other minor compounds. The major constituents of all the studied germplasms displayed the same major compounds in their essential oil with varying area percentage. Hence, with having these well known bioactive phytoconstituents, the essential oil of E. prostrata would have enough significance in the food and pharmaceutical industries.

中文翻译：

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一维气相色谱和质谱法基于电子电离检测旱莲草 (Linn.) 地上部分的挥发性成分

摘要 Eclipta prostrata (Linn.) (Family: Asteraceae) 是一种重要的印度药材，具有多种治疗潜力。在本研究中，通过水力蒸馏从奥里萨邦 10 个不同地区收集的 E. prostrata 地上部分提取精油，并使用一维气相色谱与质谱联用 (GC/MS) 进行分析。鉴定出 59 种挥发性化合物，占总油的 68.84-96.58%。倍半萜烃是主要的化合物组，其变化范围为 26.84-62.67%，其次是单萜烃 (28.93-38.66%)。E. prostrata 油富含 α-蒎烯 (11.2 - 18.23%)，其次是石竹烯 (8.56 - 15.38%)、α-葎草烯 (1.8-11.1%)、α-蒎烯 (2.6 - 8.72%)、莰烯 (2.6) - 8.5%)、异芳香族二烯 (2.5 - 6.99%)、α-吗啉 (0.3 - 7. 8%), cis-muurole-4(14),5-diene (1.2 - 5.7%), eugenol (2.13 - 4.1%) 其次是其他次要化合物。所有研究种质的主要成分在其精油中显示出相同的主要化合物，但面积百分比不同。因此，拥有这些众所周知的生物活性植物成分，E. prostrata 精油在食品和制药行业将具有足够的意义。