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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국자기공명학회 Journal of the Korean Magnetic Resonance Society Journal of the Korean Magnetic Resonance Society 제22권 제3호
- 발행연도
- 2018.1
- 수록면
- 54 - 63 (10page)
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초록· 키워드
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Nymphaea tetragona, also known as waterlilies, is aquatic plant in the family of Nymphaeceae. Three flavonoids(3, 4, and 5) and one mixed flavonoids were separated from this plant. The mixed flavonoid consisted of two flavonoids; a well-known querce-tin(1) and a new natural flavonoid(2). The latter also has two chiral centers and their configurations were established by ROESY experiment. Two glycoflavo-noids were determined as isoquercetin and querce-tin-3-O--xyropyranosyl-(1→2)--galacto- pyroside. The 1H NMR spectra for 4 and 5 dissoloved in DMSO-d6 solvent showed resonance proximity and and severely overlap in the glycoside region, hindering the determination of the configurations of the stereogenic centers of the sugar moieties. This problem was solved through the spin simulation. Here, the exact NMR parameters for the sugar moie-ties of 4 and 5 were listed.
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