α-Glucosidase and α-amylase inhibitory constituent of Carex baccans: Bio-assay guided isolation and quantification by validated RP-HPLC-DAD

► C. baccans is reported as nutritional food for cardio and cerebrovascular diseases. ► (+)-α-Viniferin was identified as inhibitor of α-glucosidase and α-amylase in vitro. ► Smiglasides A and B were also identified in the plant. ► (+)-α-Viniferin was quantified in the plant extract and fractions using HPLC. ► The HPLC method was validated.