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: COC1=C(C(=O)O)N2C(=O)C(NC(=O)C(N)C3C=CCC=C3)C2SC1
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#}