[ 3h ] r5020 binding , under conditions selected to favor binding to the high affinity site , was reversible , protease-sensitive and inhibited in a concentration-dependent manner by steroids with the following order of potency : r5020 greater than norgestrel greater than norethindrone greater than progesterone greater than norethindrone acetate greater than norethynodrel greater than deoxycorticosterone greater than lynestrenol greater than quingestanol greater than testosterone greater than 17 beta-estradiol greater than cortisol .
C0028356
norethindrone
C0068980
norethindrone acetate