The present invention is directed to compounds having the formula (I), and/or pharmaceutically-acceptable salts thereof, useful in the treatment of androgen-receptor associated conditions, wherein Ar is aryl, substituted aryl, heteroaryl, or substituted heteroaryl; L is a linker as defined in the specification; R.sub.1 may be hydrogen, cyano, alkyl, substituted alkyl, aryl, substituted aryl, cycloalkyl, substituted cycloalkyl, heterocyclo, substituted heterocyclo, heteroaryl, or substituted heteroaryl, as defined in the specification; R.sub.2 is hydrogen, lower alkyl, or substituted lower alkyl; and R.sub.3, R.sub.4 and R.sub.5 are optionally non-interfering substituents as defined in the specification.