You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I give you a description of a molecule, and you need to return one molecule in SMILES that meets the description. The description: The molecule is cftr modulator.
user
Cc1ccnc(Cl)c1-c1nc(NS(=O)(=O)c2cccc(F)n2)ccc1Cl
assistant