60755-80-8

Sanguinine has a more potent acetylcholinesterase inhibitory activity than galanthamine due to an extra hydroxyl group available for potential interaction with acetylcholinesterase. Sanguinine, in turn, is 10-fold more selective than galanthamine for acetylcholinesterase (AChE) vs. butyrylcholinesterase (BuChE). The lack of AChE inhibitory activity of lycoramine and epinorlicoramine could be due to the occurrence of a double bond in ring C, which does not allow these alkaloids to have the same spatial configuration as the active alkaloids of this series.