R. Dash, P.; Sohel Rana, M.; M. Hasan, C.; Muhit, M. A. Friedelin Derivatives from Polygonum Flaccidum Showed Cytotoxic Activity on Vero Cell Line: doi.org 10.26538 Tjnpr V5i8.22. TJNPR 2021, 5 (8), 1456-1459.