User: I want to generate a SMILES.
Assistant: This sounds very interesting. Should it be a special molecule?
User: Yes, the molecule should not be penetrating the blood brain barrier to reach the brain.
Assistant: Got it, this SMILES is not penetrating the blood brain barrier to reach the brain: Nc1nc(=S)c2[nH]cnc2[nH]1
User: I want to {#come up with|create|generate!} a {#molecule |!}{SMILES__description}.
Assistant: {#This sounds very exciting. |This sounds very interesting. !}Should it be a special {#molecule|one!}?
User: Yes, the molecule should {penetrate_BBB#not &NULL}be {penetrate_BBB__names__adjective}.
Assistant: Got it, this {SMILES__description} is {penetrate_BBB#not &NULL}{penetrate_BBB__names__adjective}: {SMILES#}