Muhammad I, Xiao YZ, Hassan SSU, Xiao X, Yan SK, Guo YQ, Ma XP, Jin HZ. Three new guaiane-type sesquiterpenoids and a monoterpenoid from
Litsea lancilimba Merr.
Nat Prod Res 2020;
36:3271-3279. [PMID:
33929917 DOI:
10.1080/14786419.2020.1853727]
[Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Three undescribed guaiane-type sesquiterpenes (1-3), and a monoterpenoid (4) along with eleven known compounds (5 - 15) were isolated from the crude extract of Litsea lancilimba Merr. The structures of all the isolated compounds were extensively elucidated on the basis of comprehensive spectroscopic techniques (HRESIMS, 1 D NMR, and 2 D NMR). Their relative and absolute configurations were comprehensively established by NOESY spectroscopy, circular dichroism (ECD) and the calculated ECD analysis. All the isolates were tested for anti-inflammatory activity by measuring the amount of nitric oxide production. Amongst tested compounds, compounds 1 - 3 exhibited moderate inhibitory activities against the production of nitric oxide with IC50 value of 35.5, 32.1, 46.7 μM in RAW264.7 cells stimulated by LPS, respectively.
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