Patent ID: 8252796

Claim:
A 1-butyl-2-hydroxyl aralkyl piperazine derivative, characterized in that, the derivative is the free alkali or its salt of compound of formula (1), or the free alkali or its salt of the optical isomers of compound of formula (1): wherein, Ar 1 represents benzene, substituted phenyl, a 5-member or 6-member aromatic heterocycle containing N, O or S, or cinnamenyl; m is an integer of 0˜5; R 1 represents hydrogen, C 1 -C 5 alkyl, C 5 or C 6 alicyclic ring, benzene, substituted phenyl, hydroxyl, amino, substituted amino, C 1 -C 4 alkoxy, C 1 -C 4 acyl, halogen, carboxylic acid or carboxylic ester.