Estrogens and antiestrogens H3C OH OH HOr HOr Estradiol雌二醇 Diethylstibestrol己烯雌酚 H5 C2 NCH2 ch20 C=C Clomiphene氯米酚H5C2 H5C2 NCH2CH2O C Cl C H3C OH HO OH HO Estradiol 雌二醇 Diethylstibestrol 己烯雌酚 Clomiphene 氯米酚 Estrogens and antiestrogens