Oligomer-opioid agonist conjugates
The invention provides compounds that are chemically modified by covalent attachment of a water-soluble oligomer. A compound of the invention, when administered by any of a number of administration routes, exhibits characteristics that are different from those of the compound not attached to the water-soluble oligomer.
1. A compound having the formula:
wherein n is an integer having a value of from 1 to 9, or pharmaceutically acceptable salts thereof.
2. The compound of claim 1 , wherein n is 1.
3. The compound of claim 1 , wherein n is 2.
4. The compound of claim 1 , wherein n is 3.
5. The compound of claim 1 , wherein n is 4.
6. The compound of claim 1 , wherein n is 5.
7. The compound of claim 1 , wherein n is 6.
8. The compound of claim 1 , wherein n is 7.
9. The compound of claim 1 , wherein n is 8.
10. The compound of claim 1 , wherein n is 9.
11. A composition comprising a compound having the formula:
wherein n is an integer having a value of from 1 to 9, or pharmaceutically acceptable salts thereof; and a pharmaceutically acceptable carrier.
12. The composition of claim 11 , wherein n is 1.
13. The composition of claim 11 , wherein n is 2.
14. The composition of claim 11 , wherein n is 3.
15. The composition of claim 11 , wherein n is 4.
16. The composition of claim 11 , wherein n is 5.
17. The composition of claim 11 , wherein n is 6.
18. The composition of claim 11 , wherein n is 7.
19. The composition of claim 11 , wherein n is 8.
20. The composition of claim 11 , wherein n is 9.