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CAS: 113402-31-6 Summenformel: C22 H13 N3 Molekulargewicht (g/mol): 319.36 Synonym: Letrozole Impurity B IUPAC-Name: 4-[bis(4-cyanophenyl)methyl]benzonitrile SMILES: N#Cc1ccc(cc1)C(c2ccc(cc2)C#N)c3ccc(cc3)C#N