Task: Please give me a SMILES based on the description below.
Description: A molecule that is not permeable through the membrane separating circulating blood and extracellular brain fluid.
Result: O=S(=O)([O-])CCS.[Na+]
Task: Please {#give me|create|generate!} a {#molecule |!}{SMILES__description} based on the {#text |!}description{# below|!}.
Description: A molecule that is {p_np#not &NULL}{p_np__names__adjective}.
Result: {SMILES#}
O=S(=O)([O-])CCS.[Na+]
O=S(=O)([O-])CCS.[Na+]
sodium;2-sulfanylethanesulfonate