Two new polyacetylene, namely arteordoyn A (1) and arteordoyn B (2), together with four known compounds, were isolated from the petroleum ether extract of Artemisia ordosica (A. ordosica). The structures elucidation of 1 and 2 were carried out by 1D-NMR ( 1 H and 13 C NMR) and 2D-NMR (COSY, HSQC, HMBC and NOESY) spectral analysis.
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