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Articles

A new labdane-type diterpenoid from Leonurus japonicus

, , , , , , & show all
Pages 627-632 | Received 05 Dec 2017, Accepted 09 Apr 2018, Published online: 23 Apr 2018
 

Abstract

Five fractions prepared from the crude extract of Leonurus japonicus were examined in order to determine their cytotoxic potential. Under the bioassay guidance, a new labdane-type diterpenoid (1), and nine known ones (2–10) along with a seco-labdane (11) were isolated from the aerial parts of Leonurus japonicus. The structure elucidation was primarily based on comprehensive spectroscopic analyses, including HRESIMS, IR, and 1D and 2D NMR methods. Compound 4 (6β-hydroxy-15,16-epoxylabda-8,13(16),14-trien-7-one) exhibited potential cytotoxicity against HeLa cell line (IC50 = 23.75 μM).

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