The molecule with the SMILES C[Si](C)(C)OC1(C#N)C2C3CC4C2C(=O)C2C4C3C21 displays no activity against HIV.
The molecule with the {SMILES__description} {#representation of |!}{SMILES#} {#shows|exhibits|displays!} {activity_HIV#no &NULL}{activity_HIV__names__noun}.