Three caffeoylquinic acid isomers showed quite similar antioxidant activities, indicating that the position of esterification on
the quinic moiety of caffeoylquinic acid had no effect on its antioxidant activities. Quite the contrary, a difference among
dicaffeoylquinic acid isomers was observed, namely, ICAA and ICAB exhibited the same antioxidant activities, whereas ICAC had
higher antioxidant activities than ICAA and ICAB in some assays, which implied that their antioxidant activities were probably
influenced by the position of esterification on the quinic moiety