You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Build a molecule that meets the requirement: The molecule is a modulate and belongs to the cystic fibrosis treatment class of molecules, with the characteristic of being cftr modulator.
user
Cc1nc2ncc(N(C)C(=O)c3cccc(-n4nc(C(F)(F)F)c(Cl)c4C)c3)cc2o1
assistant