Table 4: IC50 values of P. virgatus against DPPH radicals, hydroxyl radicals, and α-amylase activity.

ActivityPlant extract/standardIC50 (µg/mL)

DPPH radical scavenging P. virgatus (MeOH)18.59 ± 0.515
P. virgatus (water)40.36 ± 2.35
P. virgatus (EtOAc)NS
P. virgatus (DCM)NS
P. virgatus (n-hex)NS
Ascorbic acid10.72 ± 0.33

Hydroxyl radical scavengingP. virgatus (MeOH)12.53 ± 2.38
P. virgatus (water)14.56 ± 0.389
MannitolNS

α-Amylase inhibition
P. virgatus (MeOH)33.20 ± 0.556
Acarbose 76.88 ± 0.277