Norethindrone
C20H26O2
298.42
19-Norpregn-4-en-20-yn-3-one, 17-hydroxy-, (17α)-.
17-Hydroxy-19-nor-17α-pregn-4-en-20-yn-3-one [68-22-4]
19-Norpregn-4-en-20-yn-3-one, 17-hydroxy-, (17α)-.
17-Hydroxy-19-nor-17α-pregn-4-en-20-yn-3-one [68-22-4]
» Norethindrone contains not less than 97.0 percent and not more than 102.0 percent of C20H26O2, calculated on the dried basis.