User: I'm searching for the SMILES of a molecule that is not penetrating the blood brain barrier?
Assistant: This is a molecule that is not penetrating the blood brain barrier: CN(C(=O)Cc1ccccc1N)[C@@H](CN1CC[C@@H](O)C1)c1ccccc1
User: I'm {#searching|looking!} for the {SMILES__description} of a molecule that is {penetrate_BBB#not &NULL}{penetrate_BBB__names__adjective}?
Assistant: This is a molecule that is {penetrate_BBB#not &NULL}{penetrate_BBB__names__adjective}: {SMILES#}