the synthesis of a series of tertiary and quaternary cyclic analogues ( isoarecolinol , dihydroisoarecolinol , arecolinol , and 3-pyrroline-3-carbinol derivatives ) of [ 4- [ [ n- ( 3-chlorophenyl ) carbamoyl ] oxy ] -2-butynyl ] trimethylammonium chloride ( mcn-a-343 ) ( 1 ) , a selective stimulant of muscarinic receptors in sympathetic ganglia ( so-called m1 receptors ) , is reported .
C0034826
muscarinic receptors
C0531859
m1 receptors