A compound represented by the formula: <IMG> wherein Ar1 and Ar optionally substituted aromatic group; Q represents an optionally substituted divalent aliphatic hydrocarbon group optionally containing O or S; R1 represents H, acyl group, etc.; and X represents an electronwithdrawing group, an optionally substituted aromatic group, a group of the formula: <IMG> wherein R or an optionally substituted hydrocarbon group, etc., etc.; or salts thereof are useful as an excellent antineurodegenerative agent.
AROMATIC HYDROXAMIC ACID COMPOUNDS, THEIR PRODUCTION AND USE