99% Aromatase Inhibitor Formestan Cancer Treatment Steroids Formestane CAS 566-48-3

99% Aromatase Inhibitor Formestan Cancer Treatment Steroids Formestane CAS 566-48-3

1. Product name: Formestane
Alias: Lentaron; 4-hydroxy-androst-4-ene-17-dione; 4-hydroxy-delta(sub4)-androstenedione
CAS register number: 566-48-3
Molecular formula: C19H26O3
Melting point: 199-202°C
Assay: 99%
Molecular structure:

2. Description:

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.

A. 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.

B . 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.


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