Abstract: This invention relates to novel anthelmintic compositions containing as the essential active ingredient, a compound of the formula: ##STR1## wherein R.sup.1 is cylcoalkyl, or optionally substituted aralkyl, aryl, pyridyl, or pyrazinyl;R.sup.2 is hydrogen, alkyl, cycloalkyl, alkoxyalkyl, alkylthioalkyl, cyanoalkyl, alkenyl, or optionally substituted aralkyl or aryl;R.sup.1 and R.sup.2 taken together with the nitrogen atom to which they are attached form an optionally substituted morpholino or piperidino group;R.sup.3 is hydrogen, alkyl, cycloalkyl, alkenyl, or optionally substituted aralkyl or aryl;R.sup.4 is alkoxy, haloalkoxy, dialkylamino, alkylthio, phenoxy or phenylthio; andR.sup.5 is alkyl, alkoxy, haloalkoxy, dialkylamino, alkylthio, phenyl, phenoxy or phenylthio; andX is oxygen or sulfur;And pharmaceutically acceptable metal salts and metal salt complexes thereof, and to methods of employing them in the treatment of intestinal parasites in animals, e.g. mammals, fish, and birds.