Antiproliferative and Microtubule-stabilizing Activities of Two Iboga-vobasine Bisindoles Alkaloids from Tabernaemontana corymbosa in Colorectal Adenocarcinoma HT-29 Cells.
Two iboga-vobasine bisindoles, 16-decarbomethoxyvoacamine (1 ) and its 19,20-dihydro derivative, 16-decarbomethoxydihydrovoacamine (2 ) from