| abstract |
Novel compounds of the formula wherein R is optionally substituted heteroaryl or R1 is H or C1-C6 alkyl; and R2 and R3 are -CH3, -OCH3 or halo; or a pharmaceutically acceptable salt or solvate thereof, pharmaceutical compositions therefore, and the use of said compounds in the treatment of pain, anxiety, cough, asthma, depression and alcohol abuse are disclosed. |