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Acylated flavonol glycosides from Eugenia jambolana leaves
被引:110
作者:
Mahmoud, II
Marzouk, MSA
Moharram, FA
El-Gindi, MR
Hassan, AMK
机构:
[1] Natl Res Ctr, Chem Tannins & Prot Dept, Cairo, Egypt
[2] Helwan Univ, Fac Pharm, Dept Pharmacognosy, Cairo, Egypt
[3] Helwan Univ, Fac Pharm, Dept Pharmacognosy, Cairo, Egypt
关键词:
Eugenia jambolana;
Myrtaceae;
leaves;
acylated flavonol glycosides;
ID and 2D NMR;
ESI-MS;
D O I:
10.1016/S0031-9422(01)00365-X
中图分类号:
Q5 [生物化学];
Q7 [分子生物学];
学科分类号:
071010 ;
081704 ;
摘要:
Two acylated flavonol glycosides and 15 known polyphenols have been isolated and identified from the leaves of Eugenea jambolana Lam. The structures of the new compounds were identified as 3-O-(4 " -O-acetyl)-alpha -L-rhamnopyranoside of mearnsetin (myricetin 4'-methyl ether) and myricetin 3-O-(4 " -O-acetyl-2 " -O-galloyl)-alpha -L-rhamnopyranoside. The complete structure elucidation of all isolated metabolites based on chemical and spectroscopic methods of analysis (UV, 1D and 2D NMR) as well as negative ESI-MS with and without CID in-source fragmentation. (C) 2001 Elsevier Science Ltd. All rights reserved.
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页码:1239 / 1244
页数:6
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