Academic Journal
Extractives in Betula celtiberica stemwood and isolation and identification of diarylheptanoids in the hydrophilic extract
| العنوان: | Extractives in Betula celtiberica stemwood and isolation and identification of diarylheptanoids in the hydrophilic extract |
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| المؤلفون: | Smeds, Annika I., Herrera, René, Rahkila, Jani, Willför, Stefan M. |
| المصدر: | Smeds , A I , Herrera , R , Rahkila , J & Willför , S M 2021 , ' Extractives in Betula celtiberica stemwood and isolation and identification of diarylheptanoids in the hydrophilic extract ' , Holzforschung , vol. 75 , no. 11 , pp. 1001-1011 . https://doi.org/10.1515/hf-2021-0022 |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Betula celtiberica, diarylheptanoids, GC-MS, hydrophilic extractives, NMR, structural elucidation |
| الوصف: | In Betula celtiberica (Iberian white birch) stemwood, the content and composition of lipophilic and hydrophilic extractives were determined; these have not been reported previously in this species. The total gravimetric amount of extractives was 2.2% of dry wood, of which lipophilic extractives accounted for 0.39% and hydrophilic extractives 1.84% (determined by gas chromatography-flame ionisation detection [GC-FID]). The lipophilic extract contained mainly triterpenoids and steroids. The hydrophilic extract (acetone-water 95:5 v v-1) contained mainly sugars, compounds not eluting on GC, and a large number of unidentified compounds, which accounted for 0.87% of dry wood and dominated the extract. The compounds were isolated from the extract by silica column chromatography and further purified. GC-electron impact (EI)-MS of the silylated compounds showed characteristic mass fragments that suggested them to be diarylheptanoids (DAHs). This is an interesting compound group, as many of them have shown a large variety of beneficial biological effects. Of over 80 detected DAHs, the exact mass of 17 compounds was determined by electrospray ionisation-quadrupole-time-of-flight (ESI-QTOF)-MS, and of these, the structure of 11 compounds was elucidated by nuclear magnetic resonance (NMR). One was a meta,para-bridged diphenylether and 10 were meta,meta-bridged biphenyls, of which one, 3,8,9,17-tetrahydroxy-[7,0]-metacyclophane, has not been described previously. Because of low concentrations, 21 DAHs were only tentatively identified, and of these, as many as 17 seem to be previously undescribed compounds. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| Relation: | https://research.abo.fi/en/publications/0b2f18d8-6850-440f-b0e9-f6ed2a3d4d9a |
| DOI: | 10.1515/hf-2021-0022 |
| الاتاحة: | https://research.abo.fi/en/publications/0b2f18d8-6850-440f-b0e9-f6ed2a3d4d9a https://doi.org/10.1515/hf-2021-0022 https://research.abo.fi/ws/files/33608116/Smeds_etal_2021.pdf http://www.scopus.com/inward/record.url?scp=85108116153&partnerID=8YFLogxK https://urn.fi/URN:NBN:fi-fe2022120168452 |
| Rights: | info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.105566B8 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1515/hf-2021-0022 |
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