Wiktionary
haloprogesterone
n. A therapeutic progestin.
Wikipedia
Haloprogesterone
Haloprogesterone ( INN, USAN, brand name Prohalone), also known as aloprogesterone or 6α-fluoro-17α-bromoprogesterone, is a halogenated derivative of progesterone and steroidal progestin which was previously marketed by Ayerst Laboratories but is no longer available.