CAS 566-48-3 Anti Estrogen Steroids Formestane Aromatizing Steroids For Breast Cancer

Basic Information
Place of Origin: CHINA
Brand Name: GSP
Certification: GMP , ISO 9001:2008
Model Number: CAS: 566-48-3
Minimum Order Quantity: 10g
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Supply Ability: 5000kg/Month
CAS: 566-48-3 Synonyms: Proscar
MF: C19H26O3 MW: 302.41
Storage Temp: 2-8°C Form: Solid
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anti estrogen products

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Product Name: Formestane

Product details:

 

Product name 4-Chlordehydromethyl testosterone
Other name Lentaron; 4-hydroxy-androst-4-ene-17-dione; 4-hydroxy-delta(sub4)-androstenedione
CAS register number 566-48-3
Molecular formula C19H26O3
Molecular weight 302.41
orign china
Melting point 199-202°C
Assay 99%
 

 

 

Product Description:

 

Formestane is often used to suppress estrogen production from anabolic steroids or prohormones. It also acts as a prohormone to 4-hydroxytestosterone, an active steroid which displays weak androgenic activity in addition to acting as a mild aromatase inhibitor.

Formestane (Lentaron) is a type I, steroidal aromatase inhibitor. It is used in the treatment of estrogen-receptor positive breast cancer in post-menopausal women. It is available as an intramuscular depot injection.

Formestane has poor oral bioavailability and as such is no longer popular as many orally active aromatase inhibitors have been identified.

 

Formestane was the first selective, type I, steroidal aromatase inhibitor used in the treatment of estrogen-receptor positive breast cancer in post-menopausal women. Formestane suppresses estrogen production from anabolic steroids or prohormones. It also acts as a prohormone to 4-hydroxytestosterone, an active steroid which displays weak androgenic activity in addition to acting as a mild aromatase inhibitor. It is listed as a prohibited substance by the World Anti-Doping Agency for use in athletes.

Formestane has poor oral bioavailability, and thus must be administered forthnightly (bi-weekly) by intramuscular injection. Some clinical data has suggested that the clinically recommended dose of 250mg was too low. With the discovery of newer, non-steroidal and steroidal, aromatase inhibitors which were orally active and less expensive than formestane, formestane lost popularity.

Currently, formestane (categorized as an anti-estrogenic agent) is prohibited from use in sports in accordance to the regulations of the World Anti-Doping Agency. It is not US FDA approved, and the intramuscular injection form of formestane (Lentaron) which was approved in Europe has been withdrawn.

Medical Application of Active Pharmaceutical Ingredients Formestane:
Formestane also known as lentaron,is an anti-cancer drug, it is primarily used for the treatment of postmenopausal women with advanced breast cancer, it is also effective in prostate cancer;

 

 

Product Applications:

Formestane is a second generation, irreversible, steroidal aromatase inhibitor. It inhibits the aromatase enzyme responsible for converting androgens to estrogens, thereby preventing estrogen production. Breast cancer may be estrogen sensitive or insensitive. A majority of breast cancers are estrogen sensitive. Estrogen sensitive breast cancer cells depend on estrogen for viability. Thus removal of estrogen from the body can be an effective treatment for hormone sensitive breast cancers. Formestane has been targeted specifically for the treatment of postmenopausal women. Unlike premenopausal women who produce most estrogen in the ovaries, postmenopausal women produce most estrogen in peripheral tissues with the help of the aromatase enzyme. Formestane, an aromatase inhibitor, can thus help to decrease the local production of estrogen by blocking the aromatase enzyme in peripheral tissues (ie. Adispose tissue of the breast) to treat hormone sensitive breast cancer.

 

 

COA

 

TEST ITEMS SPECIFICATION RESULTS
Description White or Almost White Crystalline Powder white powder
Identification A.B. Positive
Assay 97.0~103.0% 99.3%
Specific Rotation +101°~+105° +102.6°
Loss On Drying 1.0%max 0.27%
Melting Point 153~157°C 153.0~155.0°C
Organic Volatile Impurities meets the requirement. Conforms
Related Substances meets the requirement. Conforms
Residual Solvents meets the requirement. Conforms
Particle Size 100% ≤ 20 microns Conforms
Conclusion The specification conform with USP35 standard
 

 

 

CAS 566-48-3 Anti Estrogen Steroids Formestane Aromatizing Steroids For Breast Cancer 0

 

 

Product Dosage:

 

The most common version of formestane sold was in a topical gel form and it was dosed at 100-200mgs per application. Users would apply it onto clean, dry skin and rub in thoroughly; usually on the thighs or upper arms. It took 1 to 5 minutes to dry.

The injectable version for both breast cancer purposes and bodybuilders is 125mgs twice per week or 250mgs once per week.

 
 
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