The compound with the SMILES of C[C@@H](CN1CC(=O)NC(=O)C1)N1CC(=O)NC(=O)C1 shows no blood-brain barrier permeability.
The {#compound|chemical!} with the {SMILES__description} of {SMILES#} {#shows|exhibits|displays!} {p_np#no &NULL}{p_np__names__noun}.
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