Distribution of p-coumaroylquinic acids in commercial Coffea spp. of different geographical origin and in other wild coffee species.

Highlights • p- coumaroylquinic acids UHPLC analyses in wild coffees reported for the first time. • Use of authentic standards for identification of p CoQAs. • Total CGAs contents and measure of contribution of p CoQAs to polyphenols in coffee. • C. sessiliflora is the richest source of p CoQAs. • Effect of roasting conditions on p CoQAs content of two commercial species. Abstract Quantitative analyses of mono- p -coumaroylquinic acids (p CoQAs) and total chlorogenic acids (CGAs) in green coffee commercial lots of C. arabica, C. canephora and C. liberica from different geographical origins and eight wild Coffea species were carried out. Among the commercial lots, p CoQAs average content of C. arabica (0.67 mg/g) is higher than that of C. canephora (0.40 mg/g) being C. liberica intermediate (0.58 mg/g). As far as the analyzed wild Coffea species is concerned, C. pseudozanguebariae is characterized by the lower p CoQAs content (0.12 mg/g) whereas C. sessiliflora is by far the richest source of p CoQAs (2.18 mg/g). Effect of the roasting process on the mono- p -coumaroylquinic acids profile was evaluated for the economically exploited species C. arabica and C. canephora. For the first time distribution of mono- p- coumaroylquinic acid isomers in wild coffee species by fast and accurate UHPLC-DAD analyses using authentic standards previously synthetized, is reported. [ABSTRACT FROM AUTHOR]