| 摘要 |
Compounds of formula (I) and pharmaceutically acceptable salts thereof in which m is 0, 1 or 2; n is 2, 3, 4 or 5; X is carbonyl or a group of formula (II) in which R<SUB>5 </SUB>is H or alkyl; Y is an alkylene chain optionally substituted by one or more alkyl groups; Z is an alkylene chain containing 2 to 5 carbon atoms optionally substituted by one or more alkyl groups; R is phenyl optionally substituted by one or more halo substituents or R is naphthyl; and R<SUB>1 </SUB>and R<SUB>2</SUB>, which are the same or different, are H, alkyl, or arylalkyl, provided that when R<SUB>1 </SUB>is benzyl, R<SUB>2 </SUB>is H or methyl; have utility in the treatment of drug misuse or other addictive disorders.
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