英文别名Gemcitabine Impurity 16; 2-Deoxy-2,2-difluoro-D-threo-pentonic acid γ-lactone; 2-deoxy-2,2-difluoro-D-erythro-Pentonic acid gamma-Lactone; 2-deoxy-2,2-difluoro-1-oxoribose; D-erythro-Pentonic acid, 2-deoxy-2,2-difluoro-, γ-lactone; Gemcitabine Impurity 34; Aficamten Impurity 21; 2-deoxy-2,2-difluoro-D-ribonic acid-1,4-lactone