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 based on this description: The molecule is a endothelin antagonist.
user
CCCCN(CCCC)C(=O)CN1CC(c2cc(CO)c3c(c2)CCO3)C(C(=O)O)C1CCN1CCCC1=O
assistant