Compounds of formula (I), wherein: R.sup.1 is selected from the group consisting of hydrogen and methyl; R.sup.2 is selected from the group consisting of methyl and ethyl; R.sup.3 is selected from the group consisting of hydrogen and methyl; and the C1-C2 carbon-carbon bond may be a single or double bond. Such compounds are useful in the treatment of pathologic conditions that benefit from blockade of isozymes of 5.alpha.-reductase. ##STR1##