Study of polyphenols fromCaesalpinia paraguariensisas α-glucosidase inhibitors: kinetics and structure–activity relationship

Ellagic derivatives isolated from Caesalpinia paraguariensis bark: (1) ellagic acid, (2) 3- O -methylellagic, (3) 3,3′- O -dimethylellagic acid, and (4) 3,3′- O -dimethylellagic-4- O -β- d -xylopyranoside and their binding modes on α-glucosidase.