`` `` in vitro '' '' studies have demonstrated that methyl-p-toluene sulfonates of 1-methyl- ( ethyl ) -3-aryl-benzo ( f ) quinolinium are highly efficient inhibitors of cholinesterases , the inhibition constants ( ki ) for acetylcholinesterase and butyrylcholinesterase being equal to 2.20 +/- 0.49 and 9.43 +/- 0.39 mkm , respectively .
C0001044
r acetylcholinestera
C0008429
butyrylcholinestera