<Li> The molecule should have an oxygen atom, preferably an ester - like oxygen capable of participating in a hydrogen bond . </Li> <Li> A two - carbon unit should occur between the oxygen atom and the nitrogen atom . </Li> <Li> There must be two methyl groups on the nitrogen </Li> <Li> A larger third alkyl group is tolerated but more than one large alkyl groups leads to loss of activity </Li>

Cholinergic stimulation produces which of the following effects