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.