[{"from": "human", "value": "Create a molecule with the structure as the one described. The molecule is a fluorinated heterocyclic 2-ring compound. 2-fluoroadenine is the base moiety for many carbocyclic and acyclic nucleoside analogues, which may be used in antineoplastic studies."}, {"from": "gpt", "value": "[C][=N][C][=N][C][=Branch1][N][=N][C][=Branch1][#Branch1][=C][Ring1][=Branch1][N][Ring1][=Branch2][N][F]"}]