[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is an arabinonucleoside antimetabolite with antineoplastic activity. Nelarabine is demethoxylated by adenosine deaminase to become biologically active 9-beta-D-arabinosylguanine (ara-G); ara-G incorporates into DNA, thereby inhibiting DNA synthesis and inducing an S phase-dependent apoptosis of tumor cells. (NCI04)"}, {"from": "gpt", "value": "[C][O][C][=N][C][=Branch2][Ring1][N][=N][C][=C][Ring1][=Branch1][N][=C][N][Ring1][Branch1][C@H1][C@H1][Branch1][=N][C@@H1][Branch1][=Branch2][C@H1][Branch1][Ring2][O][Ring1][Branch1][C][O][O][O][N]"}]