Piperazine derivative and analgesic composition containing the same
申请人:Taiho Pharmaceutical Company Limited
公开号:US04518712A1
公开(公告)日:1985-05-21
An analgesic composition containing as active ingredient a piperazine derivative represented by the general formula (1) ##STR1## wherein R.sub.1 represents a cyclopropylmethyl group, an isopropyl group or an allyl group and R.sub.2 represents a phenyl group having as substituent a halogen atom or a trifluoromethyl group.