Abstract
Four new diterpenoids, laxiflorins S-V (1–4), bearing four different types, and one known compound, laxiflorin O (5), were isolated from Isodon eriocalyx var. laxiflora. Compound 1 was the first example of ent-kauranoids bearing a unique C24 carbon framework and compound 4 was the first example of 3,4-seco-ent-abietane diterpenoids from the Isodon genus. Their structures were determined by spectroscopic methods (UV, IR, MS, NMR).
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Wang, WG., Du, X., Li, XN. et al. Four new diterpenoids from Isodon eriocalyx var. laxiflora. Nat. Prod. Bioprospect. 3, 145–149 (2013). https://doi.org/10.1007/s13659-013-0057-0
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DOI: https://doi.org/10.1007/s13659-013-0057-0