User: I'm searching for the SMILES of a molecule that is not penetrating the blood brain barrier to reach the brain?
Assistant: This is a molecule that is not penetrating the blood brain barrier to reach the brain: O=C(O)c1cc(=O)c2cc(OCC(O)COc3cccc4oc(C(=O)O)cc(=O)c34)ccc2o1
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#}