Binding affinities of hexahydro-difenidol and hexahydro-sila-difenidol analogues at four muscarinic receptor subtypes: constitutional and stereochemical aspects.


Hexahydro-sila-difenidol and eight analogues behaved as simple competitive inhibitors of [3H]N-methyl-scopolamine binding to homogenates from human neuroblastoma NB-OK 1 cells (M1 sites), rat heart (M2 sites), rat pancreas (M3 sites), and rat striatum 'B' sites (M4 sites). Pyrrolidino- and hexamethyleneimino analogues showed the same selectivity profile as… (More)


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