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- Title
Identification of Three New Flavonoids from the Peels of Citrus unshiu.
- Authors
Shin, Hyun Ji; Nam, Joo-Won; Yoon, Ui Joong; Han, Ah-Reum; Seo, Eun-Kyoung
- Abstract
Three new flavonoids, 5,6,7,8,3′,4′-hexamethoxyhomoflavone ( 1), 5,6,7,8,4′-pentamethoxyhomoflavone ( 2) and 3,6,7,8,2′,5′-hexamethoxyflavone ( 3) were isolated from the peels of mature fruits of Citrus unshiu Marcow (Rutaceae), together with the three known compounds 6,7,8,4′-tetramethoxyflavone (=6,7,8-trimethoxy-2-(4-methoxyphenyl)-4 H-1-benzopyran-4-one), 3,5,7,8,2′,5′-hexamethoxyflavone (=2-(2,5-dimethoxyphenyl)-3,5,7,8-tetramethoxy-4 H-1-benzopyran-4-one), and scopoletin (=7-hydroxy-6-methoxy-2 H-1-benzopyran-2-one) of which the former two have never been isolated from natural resources, although they have been reported as synthetic compounds. The structures of 1- 3 were elucidated on the basis of spectroscopic evidence, including 1D- and 2D-NMR analysis.
- Subjects
FLAVONOIDS; BENZOPYRANS; SCOPOLETIN; NUCLEAR magnetic resonance; SATSUMA orange
- Publication
Helvetica Chimica Acta, 2012, Vol 95, Issue 2, p240
- ISSN
0018-019X
- Publication type
Article
- DOI
10.1002/hlca.201100286