... androst-4-en-17β-yl acetat) (17α-ethinyl-3-oxo estra-4-en-17β-yl acetat) LEVONORGESTREL [ (-) -1 8,19-dinor-13-ethyl-17 - hydroxy-17α-preg-4-en-20-in-3-on] [ (-) -1 8,19-dinor-17α-ethinyl-1 3- ethyl-17β-hydroxy ... Các progestin (3) PROGESTERON (Pregn(a )-4 -en-3,20-dion) OCHHHCH3O NORETHINDRON ACETAT (19-nor-3-oxo-17α-pregn-4-en-2 0- in-17β-yl acetat) (17α-ethinyl-19-nor-3-oxo androst-4-en-17β-yl ... 1.2.1. Các estrogen (2) ESTRADIOL MONOBENZOAT (17β-hydroxy ESTRA-1,3,5 (10) - trien-3-yl BENZOAT) ETHINYLESTRADIOL (Là 17α-ETHINYL ESTRADIOL) (17α-ETHINYL ESTRA-1,3,5 (10) - trien-3,17β-DIOL)...