[{"from": "human", "value": "Please give me some details about this molecule. [C][S][C][=N][C][=N][N][=C][Branch1][O][C][=Branch1][C][=O][N][Ring1][#Branch1][N][Ring1][#Branch2][N+1][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is a synthetic guanine derivative, with potential broad-spectrum antiviral activity. Upon administration, riamilovir inhibits viral RNA synthesis, thereby preventing viral transcription and replication. Riamilovir may also bind to severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) and human angiotensin-converting enzyme 2 (ACE2). This may block the entry of SARS-CoV-2 into human host cells."}]