Nna, P. J., T. A. Tor-Anyiin, and J. O. Igoli. “Fagaramide and Pellitorine from the Stem Bark of Zanthoxylum Zanthoxyloides and Their Antimicrobial Activities”. South Asian Research Journal of Natural Products, Vol. 2, no. 3, Aug. 2019, pp. 1-8, http://journalsarjnp.com/index.php/SARJNP/article/view/30085.