Standards; Pharmaceutical/API Drug Impurities/Metabolites;
Physostigmine is a parasympathomimetic, specifically, a reversible cholinesterase inhibitor obtained from the Calabar bean, used to treat glaucoma and delayed gastric emptying.
Engelhart, L., et al.: Arch. Exp. Pathol. Pharmakol., 150, 1 (1930), Muhtadi, F.J., et al.: Anal. Profiles Drug Subs., 18, 289 (1989),