Anti Breast Cancer Femara Letrozole for tumor Anti Estrogen Steroids 633-35-2 Prohormones Atd Muscle Building Steorids
Letrozole
Basic informations:
CAS NO: 112809-51-5
Content: 99% min
Molecular Formula: C17H11N5
Molecular Weight: 285.31
Appearance white or off-white powder
Melting point 181-183 ° C
What is Letrozole?
Letrozole (trade name Femara) is an oral non-steroidal aromatase inhibitor for the treatment of hormonally-responsive breast cancer after surgery.
Functions of Letrozole:
1. Treatment of postmenopausal women with advanced breast cancer (estrogen receptor, progesterone receptor positive or unknown receptor status), used for anti-estrogen therapy after the failure of second-line treatment;
2. For locally advanced or spread after the first-line treatment of postmenopausal breast cancer (foreign data);
3. For the received standard adjuvant tamoxifen therapy in postmenopausal breast cancer after five years of adjuvant therapy in patients with extension (foreign data);
4. Postoperative adjuvant therapy for hormone-positive early breast cancer patients.
Distinctions Between Letrozole and Anastrozole:
Letrozole tablets: suitable for advanced breast cancer after menopause, most used in the treatment of anti-estrogen treatment failure after second-line therapy.
Anastrozole: an effective selective inhibitor for three azole aromatase, it inhibits the aromatase relied by cytochrome P-450, further blocks estrogen biosynthesis, which is the main factor to stimulate breast cancer cell growth. The 50% inhibitory concentration (IC50) value of human placenta aromatase is 15 nmol/L.
Letrozole COA:
Tests | Specifications | Results |
Appearance | White or off-white crystaline powder | White |
Solubility | Soluble in Chloroform; | Conform |
ldentification | (1)Maximum absorption in wavelength of 240 nm | Conform |
(2)Infrared spectrum should be in accordance the dominant peak of contrast | In accordance with the dominant peak of contrast | |
Melting points | 182°C-184°C | 182°C |
Related substances | ≤0.5% | 0.3% |
Single impurity | ≤0.3% | 0.2% |
Loss on drying | ≤1.0% | 0.8% |
[Assay]C17H11N5 | ≥98.0% | 99.9% |
Conclusion | Conforms Specifications of Enterprise Standard. | |
Good Customer's feedback :
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Some Question :
Question 1, How do you pack the order ?
Discreet package, the packing suits you best would be choosen to cross customs safely
Question 2, What is your shipping method ?
Shipping by express (FedEx,UPS,DHL,EMS,HKEMS,TNT), and cheapest by airmail
Question 3, if my order seized by custom, what do you do ?
Resending police if the tracking number do not update online or it sezied by custom
Question 4, What is your payment accept ?
Safe and fast payment: Western Union, Money Gram, T/T, Bitcoin
Question 5, Will you supply tracking number ?
Yes, we supply tracking number for following. In general, once we supply the tracking number to you ,you can track the parcel information within 1-2 business days
Question 6, How many days will it take to my country after I do the payment ?
In general, fastest with 3-5 business, slowest 5-7 business days
Hot selling market :
United State(USA), United Kingdom(UK), Australia, Canada, Spain, France, Germany, Russia, Brasil(Brazil), Ukraine, South Africa , Norway, Poland, Netherlands(Holland), Slovakia, Georgia, New Zealand, Sweden etc.
