Aerial parts of Centaurea tweediei from Argentina afforded as the main constituent the sesquiterpene lactone onopordopicrin and minor amounts of a new heliangolide, a new guaianolide, a new eudesmanolide, a new eudesmane acid and the lignans arctigenin and matairesinol.

中文翻译：

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Centaurea tweediei 倍半萜内酯

来自阿根廷的 Centaurea tweediei 的地上部分提供了作为主要成分的倍半萜内酯 onopordopicrin 和少量的新向日葵内酯、新愈创木内酯、新桉内酯、新桉酸和木脂素牛蒡甙元和 matairesinol。