Chemical Constituents and Insecticidal Activity of Senna italica Mill. from the Sudan Sakina Yagi1, Sayadat El Tigani1, Mayada Ali1, Ibrahim Elkhidir1, Abdelhafeez M. A. Mohammed2,* 1Department of Botany, Faculty of Science, University of Khartoum, PO Box 321, Khartoum 11111, Sudan