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Tadalafil Impurity A CAS No.171596-27-3 / Cat No.EBD4032407
(2R,8S)-2-(2H-1,3-benzodioxol-5-yl)-6-methyl-3,6,17-triazatetracyclo[8.7.0.0³,⁸.0¹¹,¹⁶]heptadeca-1(10),11(16),12,14-tetraene-4,7-dione