You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Could you please return a molecule that adheres to this description? It belongs to the endothelin antagonist class of molecules.
user
COc1ccc(C2(O)OC(=O)C(c3cc(OC)cc(OC)c3)=C2Cc2ccccc2OC)cc1
assistant