physostigmine

A crystalline alkaloid, C₁₅H₂₁N₃O₂, extracted from the Calabar bean, used in the form of its sulfate as a miotic and in the form of its salicylate as a cholinergic agent.

An alkaloid constituting the active principle of the Calabar bean.

It is a powerful depressant and nerve-poison: used to counteract strychnine and atropin, also to contract the pupil. Its formula is C₁₅H₂₁O₂N₃. Also called eserine.

An alkaloid found in the Calabar bean (the seed of Physostigma venenosum), and extracted as a white, tasteless, substance, amorphous or crystalline; — formerly called eserine, with which it was regarded as identical.

A parasympathomimetic, a reversible cholinesterase inhibitor alkaloid of the Calabar bean, used to treat certain medical conditions.

used in treatment of Alzheimer’s disease and glaucoma