Tabernaesines A–I, Cytotoxic Aspidosperma–Aspidosperma-Type Bisindole Alkaloids from Tabernaemontana pachysiphon

Autor: Wen-Fang Yi, Xiao-Jiang Hao, Yuan-Zhi Chen, Tiwalade A. Adelakun, Xiao Ding, Yu Zhang
Rok vydání: 2020
Předmět:
Zdroj: Journal of Natural Products. 83:3215-3222
ISSN: 1520-6025
0163-3864
DOI: 10.1021/acs.jnatprod.9b00768
Popis: Twenty-one aspidosperma-aspidosperma alkaloids, including the new tabernaesines A-J (1-9), were obtained from Tabernaemontana pachysiphon. The structures and absolute configurations were elucidated using HRMS and NMR experiments. Compounds 1-9 possessed a rare spiro heterocycle moiety between the monomeric units, while compounds 4 and 5 were characterized by an indole ring fused with an (N,N-diethyl)methyl amino group. Compounds 1, 5-7, 15, and 16 exhibited moderate cytotoxic potency against various human cancer cell lines at IC50 2.5-9.8 μM.
Databáze: OpenAIRE