Agent for treating Parkinson's disease comprising astrocyte function-improving agent as active ingredient

摘要

An agent for preventing and/or treating Parkinson's disease or Parkinson's syndrome, comprising, as an active ingredient, an astrocyte function-improving agent is disclosed. The astrocyte function-improving agent is preferably a compound represented by formula (I), a non-toxic salt thereof, or a hydrate thereof: R⁵, R⁶, R¹¹ and n are defined in the specification.