{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,3]],"date-time":"2026-07-03T02:05:15Z","timestamp":1783044315130,"version":"3.54.6"},"reference-count":25,"publisher":"MDPI AG","issue":"16","license":[{"start":{"date-parts":[[2024,8,13]],"date-time":"2024-08-13T00:00:00Z","timestamp":1723507200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Ministry of Education, Youth and Sports of the Czech Republic","award":["CZ.02.01.01\/00\/22_008\/0004635"],"award-info":[{"award-number":["CZ.02.01.01\/00\/22_008\/0004635"]}]},{"name":"Ministry of Education, Youth and Sports of the Czech Republic","award":["RVO 67985939"],"award-info":[{"award-number":["RVO 67985939"]}]},{"name":"Long-term research development","award":["CZ.02.01.01\/00\/22_008\/0004635"],"award-info":[{"award-number":["CZ.02.01.01\/00\/22_008\/0004635"]}]},{"name":"Long-term research development","award":["RVO 67985939"],"award-info":[{"award-number":["RVO 67985939"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Molecules"],"abstract":"<jats:p>Stilbenes in the roots of Carex acuta and Carex lepidocarpa were studied. Root samples were extracted with 100% methanol and analyzed by HPLC and LC-MS. In this way, trans-resveratrol dimers (m\/z 455 Da [M + H]+), trimers (m\/z 681 Da [M + H]+) and tetramers (m\/z 907 Da [M + H]+) were identified in the extracts. Using LC-NMR in stop-flow mode, pallidol and trans-\u03b5-viniferin as dimers were identified. After the separation of individual peaks and their measurement by 1H NMR, cis and trans-miyabenol A as a tetramer and cis-miyabenol C as a trimer were identified. In the case of miyabenol A, it is a chromatographically inseparable mixture of cis and trans isomers in the ratio of 2:3 according to 1H NMR measurement. In the case of cis-miyabenol C, the Z-trans-trans-miyabenol C configuration was confirmed. The remaining unidentified peak with a practically identical UV-VIS spectrum to that of cis-miyabenol C is most likely another isomer of miyabenol C.<\/jats:p>","DOI":"10.3390\/molecules29163840","type":"journal-article","created":{"date-parts":[[2024,8,13]],"date-time":"2024-08-13T13:35:49Z","timestamp":1723556149000},"page":"3840","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Stilbenes in Carex acuta and Carex lepidocarpa"],"prefix":"10.3390","volume":"29","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3846-2158","authenticated-orcid":false,"given":"Jan","family":"T\u0159\u00edska","sequence":"first","affiliation":[{"name":"Laboratory of Metabolomics and Isotope Analyses, Global Change Research Institute, Czech Academy of Sciences, B\u011blidla 986\/4a, 603 00 Brno, Czech Republic"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nad\u011b\u017eda","family":"Vrchotov\u00e1","sequence":"additional","affiliation":[{"name":"Laboratory of Metabolomics and Isotope Analyses, Global Change Research Institute, Czech Academy of Sciences, B\u011blidla 986\/4a, 603 00 Brno, Czech Republic"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6287-0314","authenticated-orcid":false,"given":"\u0160t\u011bp\u00e1n","family":"Horn\u00edk","sequence":"additional","affiliation":[{"name":"Department of Environmental Engineering, Institute of Chemical Process Fundamentals, Czech Academy of Sciences, Rozvojov\u00e1 2\/135, 165 02 Prague, Czech Republic"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2930-8880","authenticated-orcid":false,"given":"Jan","family":"S\u00fdkora","sequence":"additional","affiliation":[{"name":"Department of Analytical Chemistry, University of Chemistry and Technology, Technick\u00e1 5, 166 28 Prague, Czech Republic"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7729-1596","authenticated-orcid":false,"given":"Andrea","family":"Ku\u010derov\u00e1","sequence":"additional","affiliation":[{"name":"Department of Experimental and Functional Morphology, Institute of Botany, Czech Academy of Sciences, Dukelsk\u00e1 135, 379 01 T\u0159ebo\u0148, Czech Republic"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2024,8,13]]},"reference":[{"key":"ref_1","unstructured":"Koopman, J. 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