Therapeutic agents for use in the treatment of parkinson's disease.

摘要

Disclosed are therapeutic agents for use in the treatment of Parkinson's disease, such agents being xanthine derivatives of the Formula (I) and their pharmaceutical acceptable salts: <CHEM> where R<1>, R<2> and R<3> are each H, C1-C6 alkyl or allyl; and R<4> is cycloalkyl of 3 to 8 carbon atoms, a - (CH2)n-R<5> group where n is an cycloalkyl of 3 to 8 carbon atoms, a - (CH2)n-R<5> group where n is an integer of from 0-4 and R<5> is an aryl group of 6 to 10 carbon atoms or a heterocyclic group, such aryl or heterocyclic group optionally being substituted by up to 3 substituent(s) selected from C1-C6 alkyl, hydroxy, C1-C6 alkoxy, halogen, nitro and amino; or a <CHEM> group, where Y<1> and Y<2> are each H or CH3 and Z is a substituted or unsubstituted aryl or heterocyclic group as defined under R<5>.