The present invention provides a method of inhibiting, suppressing or preventing levodopa-induced dyskinesia in a patient suffering from Parkinsons Disease, comprising the step of administering to the patient a pharmaceutical composition comprising at least one compound of the invention. The present invention further provides a method of inhibiting, suppressing or preventing Parkinsons Disease in a patient, comprising the step of administering to the patient a pharmaceutical composition comprising at least one compound of the invention.
