... : 3-[[3-(3,4-Dihydroxyphenyl)-1-oxo-2-propenyl]oxy]-1,4,5-trihydroxycyclohexanecarboxylic acid; 5-O-(3,4-dihydroxycinnamoyl)-L-quinic acid; (1S,3R,4R,5R)-3-[[3-(3,4 ... activity of ionophore-stimulated human polymorphonuclear leukocytes.Chlorogenic acid, an ester of caffeic acid and quinic acid, is a major phenolic compound in coffee ...