HPLC-MASS SPECTROMETRY APPLIED ON THE PHENOLIC COMPOUNDS IDENTIFICATION IN E. GLOBULUS, E. GRANDIS, E. UROGRANDIS AND E. MAIDENII BARK EXTRACTS

摘要

It is the first study about the phenolic fraction in E. grandis, E. urograndis and E. maidenii bark extracts; HPLC-ESI-MS and MS~(n) analysis allowed the identification a total of 32 phenolic compounds, including several phenolic acids and esters, flavonoids, flavonoids glycosides, galloylglucose derivatives and ellagitannins in the bark from four species of Eucalyptus; 14 of the compounds identified in E. globulus bark are referenced for the first time as its constituents, being digalloylglucose and catechin the most abundant; Epicatechin and quercetin-glucuronide are the most abundant compounds in E. grandis and E. urograndis bark, while in E. maidenii bark extract catechin and methyl-ellagic-pentose are the major compounds.