Patent ID: 7098200

Claim:
A method of treating pain in a mammal comprising administering to a mammal in need thereof, a pain treating effective amount of at least one compound having the formula (II): wherein: Z is —CH 2 CH 2 —, —CH 2 C(R 6 )(R 7 )CH 2 — or —CH 2 C(R 8 )(R 9 )—C(R 10 )(R 11 )CH 2 —, where R 6 , R 8 and R 10 are, independently, hydrogen or hydroxyl, and R 7 , R 9 and R 11 are hydrogen; A is —CH 2 CH 2 —; X is P(O)(OR 4 )(OR 5 ), wherein R 4 and R 5 are independently hydrogen or alkyl of 1 to 6 carbon atoms; or a pharmaceutically acceptable salt thereof.