[{"from": "human", "value": "What can you tell me about this molecule? [C][=N][C][=C][Branch1][Ring2][N][Ring1][Branch1][C][=Branch1][C][=S][N][=C][Branch1][Ring2][N][Ring1][Branch2][N]"}, {"from": "gpt", "value": "The molecule is a 2-aminopurine that is the 6-thiono derivative of 2-amino-1,9-dihydro-6H-purine. Incorporates into DNA and inhibits synthesis. Used in the treatment of leukaemia. It has a role as an antineoplastic agent, an antimetabolite and an anticoronaviral agent."}]