norethisterone enanthate norethindrone aenanthate injectable contraceptive drug molecule. skeletal formula.

norethisterone enanthate norethindrone aenanthate injectable contraceptive drug molecule skeletal formula enantate progestin antigonadotropic antiandrogen antiestrogen hormonal contraception oenanthate injection birth prevention pregnancy intramuscular hormone control endocrine heptanoic heptanoate enanthic oenanthic hydrogen carbon oxygen atoms atomic molecular compound composition chemical chemistry structure line drawing flat icon