A decade later, norethindrone would become the key component for birth control pills.
From the scienceblogs.com
The latest, so far unnamed, is reported to be fifty times as active in rabbits as norethindrone, and cheaper to make.
From the newscientist.com
Luis would make science history with them in 1951 by playing a key role in the synthesis of the compound norethindrone, one of the most potent oral progestins ever made.
From the scienceblogs.com
Chang screened nearly 200 chemical compounds in animals and found the three most promising were Syntex's norethindrone and Searle's norethynodrel and norethandrolone.