Compounds of the formula (I): ##STR00001## or pharmaceutically acceptable salts, solvates or prodrugs thereof, where R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7, R.sup.8, R.sup.9, X, Y and m are as defined herein. Also provided are compositions comprising, methods for using, and methods for preparing compound of formula (I).