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한국식물학회 / v.47, no.2, 2004년, pp.163-165 
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( UV Absorbent, Marmesin, from the Bark of Thanakha, Hesperethusa crenulata L. ) |
| ;;; ;;skkimbio@cau.ac.kr;
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| 초 록 |
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| We used solvent extractions, SiO$_2$ column chromatographies, and HPLC to isolate from the bark of Thanakha (Hesperethusa crenulata L.) an active crystalline compound for absorbing UV-A radiation (320 to 380 nm). Analyses of low-and high-resolution FAB-MS revealed a compound, named marmesin, with a formula of $C_{14}$ H$_{14}$ O$_4$ and a molecular mass of 246. To determine its chemical structure, we conducted 300 MMz NMR analyses using various probes, $^1$H, $^{13}$ C, and DEPT $^{13}$ C. Our NMR data showed a structure of 2,3-dihydro-2(1-hydroxy-1-methylethyl)-furanocoumarin. This active compound contains UV-absorbing chromophores, an aromatic ring, a double bond at C3-C4, and a carbonyl at C2. Its λmax is 335 nm, indicating that marmesin could be commercially useful as a natural UV-A-filtering product. |
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| 키워드 |
| marmesin;Thanakha (Hesperethusa crenulata L.);UV-A-absorbent; |
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Journal of Plant Biology / v.47, no.2, 2004년, pp.163-165
한국식물학회
ISSN : 1226-9239
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200411922995036)
언어 : 영어 |
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| 논문 제공 : KISTI 한국과학기술정보연구원 |
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