What Is Physostigmine?

Physostigmine, also known as eserin, karacrotine and eserin, is a white, odorless, microcrystalline powder of alkaloid chemicals. Chemical name 1,2,3,3A-hexahydro-1,3A, 8-trimethylpyrrolo [2,3-B] indole-5-phenol methyl carbamate, the molecular formula is C ₁₅ H ₂₁ N ₃ O ₂ , molecular weight 275.34600, slightly soluble in water, easily soluble in ethanol, very soluble in chloroform and dichloromethane, soluble in non-volatile oil and benzene, melting point 102 ~ 104 . Mycorrhizine is an anticholinyl esterase drug, which has clinically contracting pupils and reducing intraocular pressure.

Poison lentils are erect or climbing herbs, or woody at the base. Pinnate compound leaves with 3 leaflets; stipules basally, persistent; leaflets sometimes with lobes. Flowers white or purple, arranged in racemes, born on succulent nodes on inflorescence axis; bracts small, early-falling; bell-shaped, short-toothed, 2-lip-shaped, 2 teeth connate; flag petals oval, Base with 2 inwardly folded ears, but without appendages, wing petals oval-shaped, inwardly curved, free, keel flap obovate, apex extending into a convoluted beak tip, base with distinct ears; for flag flap 1 stamen is free, and 5 of the anthers are alternated on the back and 5 bases; the ovary is stipitate, has 2-12 ovules, and the style is long. Wrapped in the spiraled beak tip of the keel flap, the upper part is thickened, the inner side is long-haired, and it is bent into a hook shape at the upper part of the stigma. Pods linear or linearly oblong, curved; seeds oval or nearly cylindrical, seed umbilical long, around half of seed. ^[1]