U. Nwachukwu, Charles, et al. “Secondary Metabolites from Curvularia Sp, An Endophytic Fungus Isolated from the Leaves of Picralima Nitida Durand and Hook (Apocynaceae): doi.org 10.26538 Tjnpr V2i5.2”. Tropical Journal of Natural Product Research (TJNPR), vol. 2, no. 5, May 2018, pp. 209-13, https://tjnpr.org/index.php/home/article/view/555.