You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Give me a molecule that satisfies the conditions outlined in the description: It belongs to the endothelin antagonist class of molecules.
user
COc1ccc(C2(O)CCC(=O)CC2(C(=O)O)C(C2=COCO2)c2ccoc2)cc1
assistant