Abstract: The novel derivatives correspond to the general formula II: ##STR1## in which: R.sub.1 R.sub.2 R.sub.3 and R.sub.4 represent identical or different groups which can each be a hydrogen or halogen atom or an alkyl group, alkoxy, or benzyloxy group and R is the residue of an R--CHO aldehyde selected from among linear or branched saturated aliphatic aldehydes including 1 to 4 carbon atoms or again represents the Z--CH.dbd.CH radical in which Z represents a hydrogen atom, a linear or branched saturated alkyl group, an aromatic nucleus or an aromatic heterocyclic nucleus or again R represents the radical HO CH.sub.2 (CH OH)n--in which n has the value of 3 or 4. The novel compounds have high solubility in water and antibacterial activity and potentiating power.

Abstract: Device for protecting animals from Ectoparasites comprising an active elementInsecticidal arrangement intended to be fastened to the neck of an animal, comprising an active element consisting of an active principle chosen from diazinone, diazoxone and the mixtures thereof, a solid macromolecular substance chosen from the vinyl and vinylidene substances, and a plasticizer, and an attachment member supporting said active member.