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Polyphenols in the leaves of some eucalyptus species
Author(s) -
Hillis W. E.,
Hingston F. J.
Publication year - 1963
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740141204
Subject(s) - ellagic acid , gallic acid , myricetin , chemistry , polyphenol , kaempferol , glycoside , quercetin , caffeic acid , botany , cyanidin , food science , organic chemistry , biology , antioxidant
The polyphenolic constituents in the leaves of fifteen Eucalyptus species have been examined qualitatively. The alcoholic extracts contained several components including ellagic and gallic acids, catechin, flavonol glycosides and polymerised leucoanthocyanins. E. salubris and E. flocktoniae contained engelitin, E. salmonophloia contained appreciable quantities of rhapontin, piceid and the glycoside of the 3,4,5,3′,4′,5′‐pentahydroxystilbene, and E. longicornis also contained the latter compound. Quercetin, ellagic, gallic and gentisic acids were present in the products of acid hydrolysis of all leaves, and myricetin, kaempferol, delphinidin, cyanidin, caffeic, sinapic and ferulic acids in some of the species. The ratio of the amounts of the polyphenols to each other was significantly different for each of the species.