Conflicts of Interest The authors declare no conflicts of interest. Data Availability Statement The data that support the findings of this study are available in the Supplementary Information of this article. Supporting Information Filename Description ejoc70918-sup-0001-SuppData-S1.pdf7 MB Supplementary Material References 1, , , , , and , “Constituents of West African Medicinal Plants XX: Quindoline From Cryptolepis Sanguinolenta,” Journal of Pharmaceutical Sciences 67 (1978): 433–434.