Specification of Letrozole,
* 4-[(4-cyanophenyl)-(1, 2, 4-triazol-1-yl)methyl]benzonitrile
* Appearance: White or off-white crystalline powder
* Assay: 99.0%
* Related substance: < 0.1%
* Loss on drying: < 0.5%
* Applications: Treating postmenopausal women with breast.
* Quantity can be supply with sample and small quanitity.