NPV was extracted using liquid–liquid extraction method and the obtained
samples were subjected to antidiabetic studies using normal and streptozotocin-induced
diabetic rat models whereas antidoxidant activities were investigated via in vitro antioxidant
tests namely 2,2-diphenyl-1-picrylhydrazyl and 2,2’-azinobis-3-
ethylbenzothiozoline-6-sulfonic acid free radicals scavenging activities and the
reducing power assay.