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
CCCCN(C(=O)CN1CC(c2cc(OC)c3c(c2)OCO3)C(C(=O)O)C1CCn1ccccc1=O)c1cccc(CN)c1
assistant