TolserineTolserine is an inhibitor of acetylcholinesterase. It has been described as of potential interest for the treatment of myasthenia gravis and Alzheimer's disease.ChemistryTolserine is a substituted derivative of phenserine. Additionally, certain analogs of tolserine possess less selectivity between different cholinesterase enzymes.Biological activityAs an inhibitor of the AChE enzyme, tolserine slows the breakdown of acetylcholine, a neurotransmitter. Tests have described tolserine as having an average IC50 value of 8.13 nM and an estimated Ki of 4.69 nM, which represents a more potent inhibition than its parent compound phenserine.