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Cytotoxic Alkaloids (44–49) and a thiophene (49) isolated from African medicinal plants with relevance to MDR cancer cells. Arborinin (44), buesgenine (45), isofagaridine (46), maculine (47), kokusaginine (48), and 2-(penta-1,3-diynyl)-5-(4-hydroxybut-1-ynyl)-thiophene (49).
