New cerebrosides and ceramide with other constituents from the aerial parts of Raphidiocystis mannii Hook. f. and their cytotoxic activities

Yves M.Mba Nguekeu, Herman D.Sonfack Fozeng, Chika Ifeanyi Chukwuma, Saw Y.Yu Hnin, Nhat Nam Hoang, Emmanuel Mfotie Njoya, Silvère Augustin Ngouela, Mathieu Tene, Tshepiso Jan Makhafola, Hiroyuki Morita^*, Maurice Ducret Awouafack