A new iridoid aglycone, 1-acetylscyphiphin B2, along with two known iridoid aglycones and three triterpenes, was isolated from the whole plant of Lindenbergia indica. The known compounds were identified as scyphiphin B1, 1β,6β,7α,8α,10-pentahydroxy-cis-2-oxabicyclo[4.3.0]nonane, salacianol, 20-hydroxylupan-3-one, and acetylursolic acid, all of which constitute the first record of such compounds from this species. The isolation of iridoids from this plant supports the taxonomic position within the tribe Gratioleae. Salacianol and acetylursolic acid exhibited moderate cytotoxic activity on all tested stomach cancer cell lines.
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Acknowledgment
We thank Dr. K Miraz Rahman of the School of Cancer and Pharmaceutical Science, King’s College London for providing technical assistance regarding NMR and HR-MS.
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Published in Khimiya Prirodnykh Soedinenii, No. 3, May–June, 2022, pp. 386–389.
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Aziz, F., Al Noman, M.A., Hasan, C.M. et al. Iridoids and Cytotoxic Terpenes from Lindenbergia indica. Chem Nat Compd 58, 450–454 (2022). https://doi.org/10.1007/s10600-022-03706-w
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DOI: https://doi.org/10.1007/s10600-022-03706-w