Aromatic hydroxamic acid compounds, their production and use

摘要

The present invention relates to a compound of the formula: <IMAGE> wherein Ar represents an optionally substituted aromatic group; Q represents a divalent aliphatic hydrocarbon group; R1 represents hydrogen, cyano, an optionally substituted hydrocarbon group, a group of the formula: <IMAGE> wherein R3 and R4 independently represent hydrogen, acyl or an optionally substituted hydrocarbon group, or R3 and R4 jointly form a ring, or acyl; R2 represents acyl; +E,ovs .........+EE represents a single bond or a double bond; m represents 1 or 2 or a salt, a process of producing thereof and an anti-neurodegenerative composition.