CO[C@@]1(NC(=O)C2SC(=C(C(N)=O)C(=O)O)S2)C(=O)N2C(C(=O)O)=C(CSc3nnnn3C)CS[C@@H]21 is not penetrating the blood brain barrier to reach the brain.
{SMILES#} is {penetrate_BBB#not &NULL}{penetrate_BBB__names__adjective}.