| 摘要 |
A class of piperazine and related heterocyclic derivatives, substituted at the 4-position by a substituted aryl or heteroaryl moiety, and at the 1-position by an ethylsulfonyl group which in turn is substituted at the 2-position by a hydroxamic acid moiety and also by a range of alternative substituents, being potent inhibitors of CD23 shedding, are useful in the treatment and/or prevention of allergic, inflammatory and neoplastic diseases.
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