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New Triterpenoid and Anti-Inflammatory Constituents of Eriobotrya deflexa f. deflexa

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A new triterpenoid, methyl 2α-(4-hydroxybenzoyl)oxy-3β-hydroxy-urs-12-en-28-oate (1), has been isolated from the leaves of Eriobotrya deflexa f. deflexa, together with five known compounds, quercetin (2), kaempferol 3-O-β-glucoside (3), naringenin (4), ursolic acid (5), and euscaphic acid (6). The structure of new compound 1 was determined through spectroscopic and MS analyses. Among the isolates, quercetin (2), naringenin (4), and ursolic acid (5) showed potent inhibition with IC50 values of 31.74 ± 1.87, 24.25 ± 1.68, and 18.05 ± 1.02 μM, respectively, against LPS-induced NO generation.

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ACKNOWLEDGMENT

This research was supported by a grant from the Ministry of Science and Technology, Taiwan (MOST 109-2320-B-010-029-MY3) awarded to Prof. J.-J. Chen. This work was also supported by grants from **tung Christian Hospital (PS 110030) and Cardinal Tien Junior College of Health and Management (CTCN-110-02). We gratefully thank Ms Shou-Ling Huang and Dr. Iren Wang for assistance in the NMR experiments at the Instrumentation Center at NTU, which is supported by the Ministry of Science and Technology, Taiwan. Hui-Ming Chen and Chien-Ming Huang have contributed equally to this manuscript.

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Correspondence to Jih-Jung Chen.

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Published in Khimiya Prirodnykh Soedinenii, No. 3, May–June, 2022, pp. 424–427.

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Chen, HM., Huang, CM., Chen, LC. et al. New Triterpenoid and Anti-Inflammatory Constituents of Eriobotrya deflexa f. deflexa. Chem Nat Compd 58, 496–500 (2022). https://doi.org/10.1007/s10600-022-03718-6

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  • DOI: https://doi.org/10.1007/s10600-022-03718-6

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