Wiktionary
norelgestromin
n. (context medicine English) A progestin used as a female contraceptive
Wikipedia
Norelgestromin
Norelgestromin ( INN, USAN, BAN), or norelgestromine, also known as 17-deacetylnorgestimate or levonorgestrel 3-oxime, is a steroidal progestin of the 19-nortestosterone group used in the contraceptive patch called Evra or Ortho Evra, where it is combined with the estrogen ethinyl estradiol. It is one of the active metabolites of norgestimate. Unlike many other 19-nortestosterone derivatives, norelgestromin has negligible androgenic activity. The drug was introduced in 2002.