摘要 |
The present invention provides methods and compositions for use in the treatment, prevention, and/or alleviation of drug abuse and/or its symptoms. In particular, the invention demonstrates that compositions comprising compounds of formula I are useful in such treatment, prevention, and/or alleviation: or a pharmaceutically acceptable salt thereof, wherein each of R<SUP>1</SUP>, R<SUP>2</SUP>, R<SUP>3</SUP>, Ar, y, and n are as defined herein. |