Azole derivatives (including stereoisomers and pharmaceutically acceptable salts) of the formula: ##STR1## wherein R.sub.1 and R.sub.2 each are H or C.sub.1 -C.sub.4 alkyl; R.sub.3 is H, OH, CN, halogen, haloalkyl, C.sub.1 -C.sub.4 alkyl or phenyl, and if there are two or more R.sub.3 groups, such R.sub.3 groups may be the same or different; n is an integer from 0 to 5; Y is N or CH; and X is O, S or NH have antimycotic and aromatase inhibitory activities. Compositions containing the azole derivatives and a method of treating mycosis and estrogen-dependent diseases by administering effective quantities of the azole derivatives are also disclosed.