The present invention provides methods of treating skin disorders includes delivering to a mammal a composition containing a compound of formula I, or tautomers thereof, in a regimen, wherein formula I is: ##STR00001## and wherein R.sup.1 R.sup.5 and Q.sup.1 are defined as described herein. Specifically, methods for treating acne, hirsutism, and a composition for conditioning the skin are described.