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): (see formula I) in which R1 and R2 represent independently methyl or ethyl; R3 represents independently hydrogen lower alkyl, lower alkenyl, or lower alkynyl; 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 (see formula II) (in which Y1 and Y2 represent independently hydrogen halogen, or lower alkyl; and Z …