The chemical with the SMILES of Cn1c(=O)c2[nH]cnc2n(C)c1=O.Cn1c(=O)c2[nH]cnc2n(C)c1=O.NCCN exhibits no permeability through the membrane separating circulating blood and extracellular brain fluid.
The {#compound|chemical!} with the {SMILES__description} of {SMILES#} {#shows|exhibits|displays!} {p_np#no &NULL}{p_np__names__noun}.
1,3-dimethyl-7H-purine-2,6-dione;ethane-1,2-diamine