nicotinic: Nicotine (low doses) · Lobeline · Varenicline · Epibatidine · Dimethylphenylpiperazinium
carbamates/stigmine: Ambenonium · Rivastigmine · Distigmine · tertiary/CNS (Physostigmine) · quaternary/peripheral (Neostigmine, Pyridostigmine)
antiparasitic (Malathion, Metrifonate)