Article
Nostocarboline: Isolation and Synthesis of a New Cholinesterase Inhibitor from<i>Nostoc</i>78-12A
1 Dec 2005
Abstract excerpt
A new quaternary beta-carboline alkaloid, nostocarboline, was isolated from the freshwater cyanobacterium Nostoc 78-12A, and its constitution was assigned by 2D-NMR methods. The structure was proven by its total synthesis starting from norharmane via chlorination at C-6 and methylation at N-2. Nostocarboline was found to be a potent butyrylcholinesterase (BChE) inhibitor, with an IC(50) of 13.2 microM. The...
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