3-Methyl-4-oxo-8-imidazolo[5,1-d][1,2,3,5]tetrazinecarboxylic acid;Temozolomide-8-carboxylic acid;3,4-Dihydro-3-Methyl-4-oxo-iMidazo[5,1-d]-1,2,3,5-tetrazine-8-carboxylic Acid;teMozoloMide acid 97%;3-Methyl-4-oxo-3,4-dihydroiMidazo[5,1-d][1,2,3,5]tetrazine-8-carboxylic acid;Temozolomideacid;Temozolomide EP Impurity B;Temozolomide EP Impurity B (Temozolomide Acid)