<unk>  is usually grouped with the stilbestrol estrogens. However,<unk>  is technically not a stilbestrol derivative because its central chain is elongated by one carbon. In any case, it is a very close analogue of the stilbestrol estrogens.
Benzestrol
Hexestrol
Fosfestrol
Dienestrol
Moxestrol
Gestodene
Dimestrol
Allenestrol