[{"from": "human", "value": "Please give me some details about this molecule. [C][C][C][N][Branch1][Branch1][C][C][Ring1][=Branch1][C][C][Branch1][=C][C][N][C][=C][N][=C][Ring1][Branch1][N+1][=Branch1][C][=O][O-1][O]"}, {"from": "gpt", "value": "The molecule is a 2-nitroimidazole with hypoxic selectivity and potential radiosensitizing activities. Pimonidazole is reduced in hypoxic environments such as those found in tumors. In hypoxic cells, reduced pimonidazole binds to thiol-containing proteins. The resulting complexes accumulate in hypoxic tumors, thereby depleting radioprotective thiol compounds and sensitizing tumor cells to be more susceptible for radiation treatment."}]