Which of the following is not a carbamate?: (A) Physostigmine, (B) Neostigmine, (C) Edrophonium, (D) Pyridostigmine
Answer is C. Ans. (C) Edrophonium(Ref: KDT 8th/e p116, Katzung 11/e p104)Physostigmine, neostigmine and pyridostigmine are carbamates by chemical nature, whereas edrophonium is an alcohol.