Xu W, Bai M, Du NN, Song SJ, Lin B, Huang XX. Chemical structures and anti-tyrosinase activity of the constituents from Elephantopus scaber L.
Fitoterapia 2022;
162:105259. [PMID:
35931288 DOI:
10.1016/j.fitote.2022.105259]
[Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2022] [Revised: 07/30/2022] [Accepted: 07/30/2022] [Indexed: 11/24/2022]
Abstract
Four undescribed compounds including one germacrane-type sesquiterpene lactones (1), alkaloid (2) along with two neolignans (3-4) were isolated from Elephantopus scaber L. Their structures and absolute configurations were elucidated unambiguously by means of 1D and 2D NMR spectroscopic data analysis, and quantum chemical electronic circular dichroism calculations, as well as single-crystal X-ray crystallography. Their anti-tyrosinase activities have been evaluated in vitro and compound 2 exhibited significant inhibitory activity. Furthermore, molecular docking was performed to study the interaction patterns between 2 and the tyrosinase.
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