“…Due to their diverse biological activities, 9,10-anthraquinones are receiving growing attention. They were reported to possess antiviral [ 3 ], antibacterial [ 4 ], antifungal [ 5 ], protein cleaving [ 6 ], anticancer [ 7 ], and antimalarial [ 8 , 9 ] properties, for example. Among the 450 genera of Rubiaceae, the genus Pentas became known for its rich anthraquinone and pyranonaphthoquinone content [ 10 ], which is responsible for the antiplasmodial activity of the root extracts of some of its species [ 11 ] that are regularly utilized in the Kenyan indigenous medicine for the treatment of malaria [ 12 , 13 ].…”