The SMILES CC(=O)NCCC[C@H](NC(C)=O)C(=O)O represents a molecule that is identified as permeable through the blood-brain barrier.
The {SMILES__description} {SMILES#} represents a molecule that is {p_np#not&NULL}identified as {p_np__names__adjective}.
CC(=O)NCCC[C@H](NC(C)=O)C(=O)O
CC(=O)NCCC[C@H](NC(C)=O)C(=O)O
(2S)-2,5-diacetamidopentanoic acid