[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is a purine 2'-deoxyribonucleoside consisting of 2'-deoxyguanosine having a 1-carboxyethyl group attached at the N(2)-position. It is functionally related to a 2'-deoxyguanosine."}, {"from": "gpt", "value": "[C][C][Branch1][=Branch1][C][=Branch1][C][=O][O][N][C][=N][C][=C][Branch1][Branch2][C][=Branch1][C][=O][N][Ring1][#Branch1][N][=C][N][Ring1][Branch2][C@H1][C][C@@H1][Branch1][=Branch2][C@H1][Branch1][Ring2][O][Ring1][Branch1][C][O][O]"}]