Patent number: 6455528
Abstract: The present invention relates to a piperazine compound of the formula
wherein R1 and R2 are each hydrogen, halogen, lower alkyl, lower alkoxy, amino, substituted amino, nitro, hydroxy or cyano, R3, R4 and R5 are each hydrogen, halogen, lower alkyl, lower alkoxy, nitro, amino, substituted amino or hydroxy, R6 and R7 are each hydrogen, lower alkyl, lower alkyl substituted by halogen, aralkyl, acyl or lower acyl substituted by halogen, R8 and R9 are each hydrogen or lower alkyl, Y is lower alkylene and the like, and ring A is phenyl, pyrimidyl, thiazolyl, pyridyl, pyrazyl or imidazolyl, a pharmaceutically acceptable salt thereof and pharmaceutical agents containing these compounds.
Type:
Grant
Filed:
April 14, 2000
Date of Patent:
September 24, 2002
Assignee:
Mitsubishi Pharma Corporation
Inventors:
Kunitomo Adachi, Yoshiyuki Aoki, Tokushi Hanano, Hiroshi Morimoto, Masao Hisadome