effects of nine choline ethers , ( ch3 ) 3 nch2ch ( r ) -o-r ' , on the muscarinic and nicotinic receptors of longitudinal smooth muscle of guinea-pig ileum were studied to understand the role of electronic/steric factors at the ether-oxygen in stimulating the cholinergic receptors .
C0034830
nicotinic receptors
C0034792
cholinergic receptors