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 nmda antagonist. Please write the SMILES representation of it.
user
CCOC(=O)N(N)c1nc(=O)[nH]c2cc([N+](=O)[O-])c(Cl)cc12
assistant