Cyril, Ogbiko, et al. “Antimicrobial and Antioxidant Xanthone Derivative from Piliostigma Thonningii Leaf”. Tropical Journal of Phytochemistry and Pharmaceutical Sciences, vol. 4, no. 8, Sept. 2025, pp. 329 – 333, doi:10.26538/tjpps/v4i8.2 .