The present invention is directed to compounds of the formula I: I
(wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, X, Z and n
are defined herein) which are useful as modulators of chemokine receptor
activity. In particular, these compounds are useful as modulators of the
chemokine receptor CCR-2. ##STR00001##