Formestane CAS 566-48-3
Pharmaceutical Intermediates Formestane ( Lentaron ) 566-48-3 for Breast Cancer
storage temp. : 2-8°C
form : solid
Product Categories: Pharmaceutical Raw Materials; Miscellaneous Biochemicals; Inhibitors;Intermediates&Fine Chemical;Pharmaceuticals; Steroids; Anti-cancer&immunity
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 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 has poor oral bioavailability and as such is no longer popular as many orally active aromatase inhibitors have been identified.
Formestane is a drug that has been previously used in breast cancer treatment. Like most drugs which have some sort of phsyique usage, athletes eventually get a hold of it. Formestane is currently one of the best legal anti-estrogens out there. It is classified as an irreversible arromatase inhibitor, meaning, it destroys the aromatase enzyme.
Another name for formestane is hydroxyandrostenedione. For those of you who don’t already know, andostenedione is and always was a lousy physique supplement (or drug, whichever you like to call it). As wel all know, the even the prohormones are now illegal in the US (as of Jan 20th, 2005). Tell me how weird chemistry can be…regular androstenedione is highly aromatizable. It converts to estogen very, very readily. When it was legal and everyone was using some form of it, I heard of numerous cases of gyno from it. At the time it was legal and was an over the counter supplement. Imagine getting gyno from something that isn’t even helping you build mass? That sucks.
Anyway, all formestane is, is androstenedione with one little hydroxyl (OH) group atttached at the fourth carbon. This small alteration turns a lousy physique androgen which aromatizes highly and has no real true use for us…into one of the best anti-estrogens you can obtain (legal or otherwise). Weird chemistry, huh?
Formestane has a very long active life on the order of 24-36 hours. You can get any sport supplement version capsules for around $40 US or less. This amount of $ will usually last you about 3-4 weeks at a sufficient dosage of 200-400mg per day. I have found 200mg a day to be perfect for on cycle anti-estrogen usage and for post-cycle recovery of natural testosterone. Formestane has zero negative feedback (even though it is an androgen by definition) and serves to elevate natural testosterone as well as any anti-estrogen/anti-aromatase drug out there, next to clomid.
|Description||: White or Almost White Crystalline Powder||white powder|
|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 USP30 standard|
estrogen steroids powder
Raw steroids powder
Steroid and Hormone;
Intermediates & Fine Chemicals
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