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 receptor modulator. Please write the SMILES representation of it.
user
O=C1CCCC1C1(O)C(=O)N(CCc2c[nH]c3ccccc23)c2ccccc21
assistant