Thi Viet Thanh N, Thanh Tung D, Van Duong L, Thi Minh T, Dinh Hoang V, Yang SY, Yen PH. Two new chlorinated sesquiterpenes from
Sigesbeckia orientalis.
Nat Prod Res 2023;
37:3677-3684. [PMID:
35862631 DOI:
10.1080/14786419.2022.2099389]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 06/17/2022] [Accepted: 07/03/2022] [Indexed: 10/17/2022]
Abstract
Two new chlorinated guaianane-type sesquiterpenes (named chlosigesolides A and B) together with eight known compounds were isolated from the leaves and twigs of Sigesbeckia orientalis. Their structures were determined by analysis of HR-ESI-MS, 1D- and 2D-NMR spectral data as well as comparison with the literature. Absolute configurations of new compounds were elucidated by NOESY and ECD methods. Chlosigesolide A inhibited NO production in LPS-stimulated RAW264.7 macrophages with IC50 value of 10.9 ± 0.8 μM. Other compounds exhibited inhibitory activity at IC50 in range of 26.5 to 49.7 μM.
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