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Acknowledgement
This work was supported by the National Natural Science Foundation of China (NSFC, No. 20372029 and 20475057) and the National Natural Science Foundation of Gansu Province of China (No. 3ZS051-A25-077).
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Published in Khimiya Prirodnykh Soedinenii, No. 3, pp. 318–320, May–June, 2008.
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Ma, XM., Di, DL. & Shi, YP. Triterpenoids and steroids from Ixeridium gracile . Chem Nat Compd 44, 399–401 (2008). https://doi.org/10.1007/s10600-008-9078-z
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DOI: https://doi.org/10.1007/s10600-008-9078-z