You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Generate a molecule that fulfills the requirement: It belongs to the endothelin antagonist class of molecules.
user
CCN(CC(C)C)C(=O)CN1CC(c2ccc3c(c2)OCO3)CC1c1ccc(OC)cc1
assistant