Letrozole

**Definition:** A triazole and benzonitrile derivative that is a selective non-steroidal aromatase inhibitor, similar to ANASTROZOLE. It is used in the treatment of metastatic or locally advanced breast cancer in postmenopausal women.

**Tree numbers:** - D02.626.300 - D03.383.129.799.638

**Synonyms:** - 4,4'-(1H-1,2,4-triazol-1-yl-methylene)-bis(benzonitrile)