Abstract: A piperidine derivative of the formula: ##STR1## wherein R represents a hydrogen atom, a (C.sub.1-4)alkyl, hydroxy(C.sub.1-4)alkyl, (C.sub.1-4)alkoxycarbonyl or benzyl radical, or a benzyl radical carrying a substituent selected from halogen atoms and (C.sub.1-4)alkoxy radicals, or the phenethyl or 3-phenylpropyl radical, and X represents one or more hydrogen or halogen atoms or (C.sub.1-4)alkyl, (C.sub.1-4)alkoxy, trifluoromethyl or methylenedioxy radicals, or alternatively X forms with the phenyl nucleus a naphthyl radical, with the proviso that when R represents a hydrogen atom X is other than a hydrogen atom, are new compounds useful in therapy and, more particularly, as antidepressants.

Abstract: 2,3-Dihydro-imidazo[1,2-b]pyridazine derivatives of the formula: ##STR1## in which R.sub.1 represents a phenyl, halogenophenyl, trifluoromethylphenyl, C(.sub.1-4)-alkylphenyl, (C.sub.1-4)-alkoxyphenyl, hydroxyphenyl, nitrophenyl, aminophenyl, (C.sub.1-4)-alkylaminophenyl, di-(C.sub.1-4)-alkylaminophenyl, acetamidophenyl, thienyl, pyridyl, furyl or nitrofuryl radical, R.sub.2 represents a hydrogen atom or a (C.sub.1-4)-alkyl radical, and R.sub.3 represents a hydrogen atom or a (C.sub.1-4)-alkyl, phenyl, halogenophenyl, trifluoromethylphenyl, (C.sub.1-4)-alkylphenyl, (C.sub.1-4)-alkoxyphenyl, hydroxyphenyl, nitrophenyl, aminophenyl, (C.sub.1-4)-alkylaminophenyl, di-(C.sub.1-4)-alkylaminophenyl or acetamidophenyl radical, and its addition salts with pharmaceutically acceptable acids are useful in therapy as antidepressants.

Abstract: 1-Hydroxy-4-(3'-m.menthen-4'-yl)-benzene, 1-hydroxy-3-methyl-4-(3'-m.menthen-4'-yl)-6-isopropyl-benzene and their sulfonates have antiviral activity against influenza virus and antibacterial activity against gram-positive bacteria.