Minor triterpene saponins from underground parts of Lysimachia thyrsiflora: structure elucidation, LC-ESI-MS/MS quantification, and biological activity.
Nat Prod Commun 2013;
8:1691-1696. [PMID:
24555274]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023] Open
Abstract
Two minor triterpene saponins, one previously not reported, were isolated from the underground parts of Lysimachia thyrsiflora L. The structures were determined based on a combination of one- and two-dimensional NMR techniques, and mass spectrometry, as 30-O-beta-D-glucopyranosyl-3beta,16alpha,30-trihydroxy-olean-12-en-28-yl acetate 3-O-beta-D-glucopyranosyl-(1--> 4)-O-[beta-D-glucopyranosyl-(1-->2)-]-O-alpha-L-arabinopyranoside (denoted as thyrsiloside A), and davuricoside L. Quantitative determination of these two compounds, along with other saponins present in L. thyrsiflora underground parts, was performed by a developed UPLC-ESI-MS/MS method, validated according to the ICH guidelines. The relative total content of triterpene saponins amounted to 1.19 microg/mg dw. Both 4 and 5 were present in minor quantities, 0.031 and 0.077 microg/mg dw, respectively. Assays performed on a panel of human cancer cell lines showed antiproliferative activity against prostate carcinoma PC-3 (GI50 after 48 h = 20 and 24 microg/mL, respectively).
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