| 摘要 |
The present invention relates to presses for preparing Cystic Fibrosis transmembrane conductance regulator (CFTR) correctors such as the compound 3-(6-( (2,2difliuorobenzo [d] [1.3]dioxol-5-yl) cyclopropanecarboxamido)-3-methylpyridin 2-yl)benzoic acid (Compound 1) in substantially free form useful in the treatment of cystic fibrosis, F O N N N CO 2 H Compound 1. |
