Steroid Hormones

CAS register number: 566-48-3
Molecular formula: C19H26O3
Molecular Weight:302.4126
Melting point: 199-202°C
Assay: 99%
Appearance: white or light green crystalloid
Grade:Pharmaceutical Grade

Formestane (lentaron, chemical name: 4-hydroxyandrostenedione) is a type I steroidal aromatase inhibitor (AI). It was developed for use in treatment of estrogen-receptor-positive breast cancer in post-menopausal women. For medical purposes, it is made in intramuscular depot form and injected. It is not used in oral form due to poor bioavailability, which makes the oral version inferior to aromasin, letrozole, and arimidex.



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