Yuan, Yu-Xi Zhang, Yu Guo, Ling-Li Wang, Yue-Hu Goto, Masuo Morris-Natschke, Susan L. Lee, Kuo-Hsiung Hao, Xiao-Jiang Tabercorymines A and B, Two Vobasinyl–Ibogan-Type Bisindole Alkaloids from Tabernaemontana corymbosa Tabercorymines A (<b>1</b>) and B (<b>2</b>), two new vobasinyl–ibogan-type bisindole alkaloids with an unprecedented skeleton, were isolated from Tabernaemontana corymbosa. Their structures were established by a combination of spectroscopic data, chemical transformation, single-crystal X-ray diffraction, and ECD calculation. Compound <b>1</b> represents a novel bisindole alkaloid, characterized by a caged heteropentacyclic ring system incorporating an unprecedented C-7/C-20 bond in the vobasinyl unit. Alkaloids <b>1</b> and <b>2</b> showed potent antiproliferative activity against several human cancer cell lines, including vincristine-resistant KB. novel bisindole alkaloid;cancer cell lines;skeleton;Vobasinyl;Compound 1;alkaloids;spectroscopic data;combination;chemical transformation;Alkaloids 1;vincristine-resistant KB;ECD calculation;Tabernaemontana corymbosa Tabercorymines;antiproliferative activity;Bisindole;Tabernaemontana corymbosa;vobasinyl unit;bond;heteropentacyclic ring system;single-crystal X-ray diffraction 2017-09-06
    https://acs.figshare.com/articles/dataset/Tabercorymines_A_and_B_Two_Vobasinyl_Ibogan-Type_Bisindole_Alkaloids_from_Tabernaemontana_corymbosa/5379673
10.1021/acs.orglett.7b02445.s002