[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][=N][C][=N][C][=Branch1][N][=N][C][=Branch1][#Branch1][=C][Ring1][=Branch1][N][Ring1][=Branch2][N][N]"}, {"from": "gpt", "value": "The molecule is one of a number of organic compounds that share a similar purine structure and possess antiviral and antitumor properties. 2,6-Diaminopurine nucleosides are versatile synthetic precursors for specific N-6 modifications of antiviral and antitumor agents. (NCI04)"}]