| abstract |
The present application relates to compounds of formula I′-A, in particular compounds of formula IA, wherein R 1a to R 5a , Y, Z a are defined as described in the specification, as well as pharmaceutically The acceptable salts and solvates are intended. The present invention also relates to the use of compounds of formula I′-A, and in particular compounds of formula IA, for treating disorders responsive to modulation of one or more opioid receptors, or as synthetic intermediates. Intended for use. Certain compounds of the present invention are particularly useful for treating pain. Embedded image Embedded image |