Five new carboline alkaloids, tunicoidines A-E ( 1- 5), and two known carboline alkaloids, 1-acetyl-β-carboline-3-carboxylic acid ( 6) and 1-acetyl-3-carbomethoxyl- β-carboline ( 7), were isolated for the first time from the root of Psammosilene tunicoides. The structures of the new carboline