On the basis of chemical reactions and spectroscopy, it has been shown that the new alkaloid iliensine has the lycoctonine skeleton with α-hydroxy groups at C3 and C10, an α-glycol system at C7-8, β-methoxy group at C6 and C15, a methoxymethyl group at C4, and an iminoethyl group. A correlation has been made of iliensine with acomonine. © 1976 Plenum Publishing Corporation.