The subject invention provides a varenicline composition that comprises varenicline, or a pharmaceutically acceptable salt thereof, and an amount of a compound selected from one or more of several mononitro, monoamino, mixed aminonitro, diamino or dinitro intermediates, and the concentration of said compound is greater than 0 ppm and not greater than about 500 ppm, not greater than about 100 ppm or not greater than about 10 ppm. Methods for synthesizing and using such varenicline compositions are also provided.
该发明提供了一种包含
瓦伦尼克林或其药学上可接受的盐以及从几种单硝基、单
氨基、混合
氨基硝基、双
氨基或双硝基中选择的一种或多种中间体的化合物的量的
瓦伦尼克林组合物,所述化合物的浓度大于0 ppm并且不大于约500 ppm,不大于约100 ppm或不大于约10 ppm。还提供了合成和使用这种
瓦伦尼克林组合物的方法。