Study To Evaluate The Pharmacokinetics, Safety, And Tolerability Of Dimebon [Pf-01913539] In Subjects With Hepatic Impairment And Normal Hepatic Function

Dimebon 5mg in healthy controls

Dimebon 5mg in mild hepatic impairment patients

Dimebon 5mg in moderate hepatic impairment patients

Dimebon 5mg in Severe Hepatic Impairment