Pseudopeptides derived from neurokinins

A compound selected from the group consisting of those of formula (I):

• ##STR33## in which:
• R.sub.1 represents indolyl, naphthyl, tetrahydronaphthyl, thienyl, or phenyl, in each case unsubstituted or substituted with one or more halogen atoms, linear or branched (C.sub.1 -C.sub.6)alkyl, linear or branched (C.sub.1 -C.sub.6)alkoxy, hydroxyl, or trihalomethyl, or R.sub.1 represents a (C.sub.3 -C.sub.7)cycloalkyl group, n represents 1 to 8 inclusive, m represents 1 to 4 inclusive, R.sub.2 represents benzyl which is unsubstituted or substituted with one or more halogen atoms, linear or branched (C.sub.1 -C.sub.6)alkyl, linear or branched (C.sub.1 -C.sub.6)alkoxy, hydroxyl, or trihalomethyl, or phenyl which is unsubstituted or substituted with one or more halogen atoms, linear or branched (C.sub.1 -C.sub.6)alkyl, linear or branched (C.sub.1 -C.sub.6)alkoxy, hydroxyl, or trihalomethyl, or R.sub.2 represents a linear or branched (C.sub.1 -C.sub.6)alkyl group, its enantiomers, diastereoisomers and epimers, and its addition salts with a pharmaceutically-acceptable acid or base.