Phenoxycarboxylic acids of the formula ##STR1## wherein R, R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, Z and n are as hereinafter set forth, are as described. The compounds of formula I are antagonists of slow reacting substance of anaphylaxis (SRS-A), which renders them useful as agents for the treatment of allergic conditions.