Object of the present invention are novel substituted compounds of the formula 1,
wherein A, R
1
, R
2
, R
3
and R
4
are defined as in the description. Another object of the present invention is to provide antagonists of CCR3, more particularly to provide pharmaceutical compositions comprising a pharmaceutically acceptable carrier and a therapeutically effective amount of at least one of the compounds of the present invention or a pharmaceutically acceptable salt thereof.