反应详情

10 grams of the lower molecular weight copolymer described in Example 2 was dissolved in 10.1 grams of NMP to give a solution with 50% w/w copolymer and 50% w/w NMP. To this solution was added 0.2085 grams of buprenorphine base. The white powdered base was thoroughly mixed and particles crushed until a clear solution was obtained. Then 0.4170 grams of palmitic acid was added to the polymer/drug/NMP solution to complex with the buprenorphine base to form buprenorphine palmitate. The white flaky palmitic acid was crushed and thoroughly mixed until a clear solution was obtained. The resultant solution was then filtered through a 0.20 μm Teflon filter as described in Example 8 to produce a sterile solution with 1% w/w buprenorphine and 2% w/w palmitic acid. The sterile solution was stored in a glass ampule with a rubber cap until needed.

1. additionThe white powdered base was thoroughly mixed
2. customparticles crushed until a clear solution
3. customwas obtained