Melengestrol

![Melengesterol synthesis:[3]](/uploads/202501/26/Melengesterol_synthesis.svg5538.png)
Melengestrol (INN, BAN) is a steroidal progestin and antineoplastic agent which was never marketed. An acylated derivative, melengestrol acetate, is used as a growth promoter in animals.
While melengestrol is sometimes used as a synonym for melengestrol acetate, what is usually being referred to is actually melengestrol acetate and not melengestrol.