The SMILES O=c1ncnc2[nH][nH]cc1-2 represents a molecule that is notidentified as permeable through the membrane separating circulating blood and extracellular brain fluid.
The {SMILES__description} {SMILES#} represents a molecule that is {p_np#not&NULL}identified as {p_np__names__adjective}.
O=c1ncnc2[nH][nH]cc1-2
O=c1ncnc2[nH][nH]cc1-2
1,2-dihydropyrazolo[3,4-d]pyrimidin-4-one