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: The molecule is a nmda antagonist.
user
Cl.NCc1ccc(CCC2CC(C(=O)O)N(N=C=O)c3cc(Cl)cc(Cl)c32)cc1
assistant