Related Experiment Video
Updated: Jun 25, 2026

An Efficient Method for the Synthesis of Peptoids with Mixed Lysine-type/Arginine-type Monomers and Evaluation of Their Anti-leishmanial Activity
Published on: November 2, 2016
Leptoclinidamines A-C, indole alkaloids from the Australian ascidian Leptoclinides durus
Anthony R Carroll1, Vicky M Avery
1Australian Rivers Institute, Griffith University, Gold Coast, Queensland, Australia. A.Carroll@griffith.edu.au
Abstract:
Three new indole alkaloids, leptoclinidamines A-C (1-3), were isolated from the Australian ascidian Leptoclinides durus. Their structures were determined by analysis of 2D NMR spectra. Leptoclinidamines A and B both contain an indoleglyoxylic acid attached to an L-arginine. The structure of leptoclinidamine A was confirmed by total synthesis. Leptoclinidamine C contains the naturally rare 1,3-dimethyl-5-(methylthio)histidine attached to a 6-bromoindole-3-carboxylic acid. Leptoclinidamine C (3) and both enantiomers of leptoclinidamine A (1) were tested for antimalarial, antitrypanosomal, and cytotoxic activity, but none of the compounds were bioactive.
More Related Videos
Related Concept Videos
Drugs for Treatment of Diarrhea-Predominant IBS
Two specific drugs used in the treatment are alosetron (Lotronex) and eluxadoline (Viberzi). Alosetron, a 5-HT3 antagonist, works by slowing the movement of stools in the gut, reducing bowel...
Antiprotozoal Agents
Anthelminthic Agents
Sedatives and Hypnotics Drugs: Miscellaneous Agents
Melatonin congeners like ramelteon (Rozerem) and tasimelteon (Hetlioz) selectively bind to melatonin receptors (MT1 and MT2) and thus mimic the actions of melatonin, a hormone that regulates sleep-wake cycles. Tasimelteon is primarily used for non-24-hour sleep-wake disorder, common in blind patients. They are also used to treat conditions like insomnia...
Direct-Acting Cholinergic Agonists: Therapeutic Uses
Direct-Acting Cholinergic Agonists: Chemistry and Structure-Activity Relationship
The direct-acting...

