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: It belongs to the endothelin antagonist class of molecules.
user
CCCN(C)C(=O)CN1CC(c2ccc3c(c2)CCO3)CC1c1ccc(OC)cc1
assistant