Letrozole & Intermediates

    1、Letrozol
         CAS：112809-51-9
         Chemical structure：

          Formula：C₁₇H₁₁N₅
          Molecular weight：285.31
          Specifition：USP30

        Related substances：Impurity A：<0.3%，

                                         Other single impurity：<0.1%，

                                          Total impurities：<0.3%

     Assay：>99.0%

2、Intermediate：4-[(1H-1,2,4-triazol-1-yl)methyl]benzonitrile

     CAS No：112809-25-3

    Chemical structure：

            Assay： >90%(HPLC)