Task: Please generate 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: C[C@@H](CN1CC(=O)NC(=O)C1)N1CC(=O)NC(=O)C1
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#}
C[C@@H](CN1CC(=O)NC(=O)C1)N1CC(=O)NC(=O)C1
C[C@@H](CN1CC(=O)NC(=O)C1)N1CC(=O)NC(=O)C1
4-[(2S)-2-(3,5-dioxopiperazin-1-yl)propyl]piperazine-2,6-dione