Indole alkaloid

TL;DR: In this article, the indole alkaloid (±)-tacamine was converted to indole acyclic intermediates via acid-catalyzed displacement of the dimethylamino group with the hydroxyl group via an iminium intermediate.

TL;DR: A new indole alkaloid N′-formylserotonin was isolated from the water extract of traditional Chinese medicine Chansu and its structures were elucidated on the basis of spectral analyses.

TL;DR: Three new indole alkaloid derivatives, named paniculidines D‒F (1‒3), and six known analogs, were isolated from the roots of Murraya paniculata on the basis of comprehensive HRESIMS, UV, IR, and NMR spectroscopic data analysis and comparison with the data reported in literature.

TL;DR: A new indole alkaloid, stapfinine, was isolated from the leaves of Ervatamia coronaria and its structure determined by spectroscopic means as discussed by the authors.

TL;DR: A pentacyclic indole alkaloid, danuphylline, was obtained from the leaf extract of Kopsia dasyrachis and its structure elucidated by spectral analysis as discussed by the authors.