You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Suppose there is a molecule that meets the following description: The molecule is a endothelin antagonist. Please write the SMILES representation of it.
user
CCCCN(C(=O)CN1CC(c2ccc3c(c2)OCCO3)C(C(=O)O)C1c1ccc(CC)cc1)c1cccc(C)c1
assistant