RT Journal Article SR Electronic T1 Structural Specificity of Substrates of Acetylcholinesterase JF Molecular Pharmacology JO Mol Pharmacol FD American Society for Pharmacology and Experimental Therapeutics SP 103 OP 107 VO 3 IS 2 A1 J. THOMAS A1 B. D. ROUFOGALIS YR 1967 UL http://molpharm.aspetjournals.org/content/3/2/103.abstract AB 1(2-Acetoxyethyl)quinuclidinium iodide has been examined as a substrate of both purified acetylcholinesterase and human serum cholinesterase. Neither enzyme is capable of hydrolyzing it. The inhibition of acetylcholinesterase by the quinuclidine ester has been investigated and the Ki is reported. The stability of the ester toward acetylcholinesterase is discussed in terms of the molecular perturbation theory of drug action. ACKNOWLEDGMENT This investigation was supported in part by grants from the National Health and Medical Research Council of Australia. The authors wish to thank Mr. B. K. Williams for assistance with the chemical work.