Therapeutic agent for parkinson's disease

Abstract From the Canadian patent

Disclosed are therapeutic agents for Parkinson's disease containing as an active ingredient a xanthine derivative or a pharmaceutically acceptable salt of the xanthine derivative, the xanthine derivative being represented by the following Formula (I): in which R1, R2, and R3 represent independently hydrogen lower alkyl, or allyl; and R4 represents cycloalkyl -(CH2)n-R5 (in which R5 represents substituted or unsubstituted aryl or a substituted or unsubstituted heterocyclic group; and n is an integer of 0 to 4) or, (in which Y1 and Y2 represent independently hydrogen or methyl; and Z represents substituted or unsubstituted aryl or a substituted or unsubstituted heterocyclic group).