Diazabicyclonane and-decane derivatives and their use as opioid receptor ligands

A compound of general formula (I),

• any of its enantiomers or any mixture of its enantiomers, or a pharmaceutically acceptable salt thereof,
• wherein
• Q is —CH2—CH2— or —CH2—CH2—CH2—;
• one of R1 and R2 is —CH2—CH2—CH2—R3, —CH2—CH═CH—R3, or —CH2—C≡C—R3;
• wherein R3 is aryl or heteroaryl;
• which aryl and heteroaryl is optionally substituted with one or more substituents selected from the group consisting of:
• halogen, hydroxy, amino, cyano, nitro, trifluoromethyl, alkoxy, cycloalkoxy, alkyl, cycloalkyl, cycloalkylalkyl, alkenyl, and alkynyl;
• and
• the other of R1 and R2 is —CO—R4;
• wherein R4 is alkyl, cycloalkyl, cycloalkylalkyl, aryl, or arylalkyl.