Tertiary amino compounds having opioid receptor affinity

Compounds of the formula (I):

• 4
• R1 is selected from the group consisting of a bond and C1-10 alkyl, alkenyl or alkenylene;
• R2 and R3 are independently selected from the group consisting of hydrogen and C1-10 alkyl, alkenyl or alkenylene
• R4 is selected from the group consisting of a bond and C1-10 alkyl, alkenyl or alkenylene, said C1-10 alkyl, alkenyl or alkenylene optionally substituted with 1-3 halogen or oxo groups;
• R5 is selected from the group consisting of hydrogen, a 5 or 6 membered aromatic or heteroaromatic group, and a C3-12 cycloalkyl;
• R6 is selected from the group consisting of C1-10 alkyl, C3-12 cycloalkyl and halogen;
• and
• N is an integer from 0-3;
• and pharmaceutically acceptable salts thereof.