You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I need a molecule that meets the following conditions: It belongs to the endothelin antagonist class of molecules. Please represent the molecule in SMILES.
user
CCCCS(=O)(=O)NCCOc1nc(C(F)(F)F)nc(NS(=O)(=O)c2ccc(C(C)C)cn2)c1Oc1ccccc1OC
assistant