Abstract: The novel compound 9-azariboflavin is prepared. This compound has anticoccidial, antiprotozoal and antiparasitic activity. It is particularly useful for controlling cecal and/or intestinal coccidiosis when administered in minor quantities to animals, in particular to poultry, usually in admixture with animal sustenance.

Abstract: New pyrazolo[4,3-e][1,2,4]triazolo[4,3-c]pyrimidines have the general formula ##STR1## They are useful as antiinflammatory agents.

Abstract: Dihydrotetrazolo [1,5-a] quinazolines having the formula: ##STR1## wherein (a) n is 0, X is oxygen, and R is optionally unsubstituted alkyl, alkenyl of at least 4 carbon atoms, alkynyl, aryl, aralkyl, alkylthio, cycloalkyl, amino or substituted aryl; or (b) n is 1 or 2, X is oxygen, R is hydrogen, or optionally-substituted alkyl, alkenyl, alkynyl, aryl, aralkyl, alkylthio, cycloalkyl, or amino, and R.sup.1 is hydroxy, halogen, nitro, alkyl or alkoxy or (c) n is 0, 1 or 2, X is sulphur, R is hydrogen, or optionally-substituted alkyl, alkenyl, alkynyl, aryl, aralkyl, alkylthio, cycloalkyl, or amino, and R.sup.1 is hydroxy, halogen, nitro, alkyl or alkoxy; or (d) n is 0, 1 or 2, X is NR.sub.2 where R.sub.2 is hydrogen, alkyl having 1 to 10 carbon atoms, benzyl or hydroxyalkyl, R is optionally-substituted alkyl, alkenyl, alkynyl, aryl, aralkyl, alkylthio, cycloalkyl, or amino, and R.sup.1 is hydroxy, halogen, nitro, alkyl or alkoxy; and salts thereof. These compounds demonstrate pesticidal activity.