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Letrazole treat in women with breast cancer Femara

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Letrozole is currently the most powerful aromatase inhibitor available.In the world of bodybuilding it is used to reduce or eliminate excess estrogen caused by the use of aromatizing steroids.
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Letrozole
Alias: Femara
CAS No: 112809-51-5
MF: C17H11N5
MW: 285.3

Purity: 98%
Appearance: white powder.

Applications:
Femara (letrozole) is a type II (non-steroidal) third generation aromatase inhibitor. Clinically it is used to treat postmenopausal women with either estrogen receptor positive or estrogen receptor unknown breast cancer.
In women with breast cancer, it has been shown to reduce estrogen levels by 98% or more (1). However, it’s use and are not limited to eliminating estrogen in women.

For pre-contest bodybuilders, Letrozole is almost a necessity to eliminate water retention and achieve the ripped look necessary to compete in today’s bodybuilding world. However, in my experience, it is only necessary to be used for the last 4-6 weeks, to eliminate excess estrogen and water retention. After using Letrozole I recommend staying away from any estrogen suppression for at least a month to try to normalize the body.

Specifications:
Tests Specifications Results
Appearance White or off-white crystaline powder White
Crystalline powder
Solubility
 		 Soluble in Chloroform;
Soluble in ethanol when heated		 Conform
ldentification (1)Maximum absorption in wavelength of 240 nm
Minimum absorption in wavelength of 215 nm		 Conform
Conform
(2)Infrared spectrum should be in accordance the dominant peak of contrast In accordance with the dominant peak of contrast
Melting points 182℃-184℃ 182℃
Related substances ≤0.5% 0.3%
Single impurity ≤0.3% 0.2%
Loss on drying ≤1.0% 0.8%
[Assay]C17H11N5
(On anhydrous basis)		 ≥98.0% 99.2%
Conclusion Conforms Specifications of Enterprise Standard.

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