Abstract: Derivatives having the formula: ##STR1## in which R.sub.1 =C.sub.1 -C.sub.4 alkyl and Ar is an aryl or heteroaryl group chosen from among the following: ##STR2## where R.sub.2 represents a hydrogen atom one or two halogen atoms, a CN, NO.sub.2 or CF.sub.3 group, one, two or three C.sub.1 -C.sub.4 alkyl or C.sub.1 -C.sub.4 alkoxy groups or an amino group substituted by two C.sub.1 -C.sub.4 alkyl groups, in which case the --W--V-- chain represents --N.dbd.N-- or ##STR3## and n=2-6; (ii) pyridyl, in which case the --W--V-- chain represents --N.dbd.N-- and n= 1-6, and acid addition salts of those derivatives (I) which are salt-forming.These derivatives are of use in therapy as agents for inhibiting type B monoamine oxydase.

Abstract: Derivatives having the formula: ##STR1## in which R.sub.1 =C.sub.1 -C.sub.4 alkyl and Ar is an aryl or heteroaryl group chosen from among the following:(i) ##STR2## where R.sub.2 represents a hydrogen atom one or two halogen atoms, a CN, NO.sub.2 or CF.sub.3 group, one, two or three C.sub.1 -C.sub.4 alkyl or C.sub.1 -C.sub.4 alkoxy groups or an amino group substituted by two C.sub.1 -C.sub.4 alkyl groups, in which case the --W--V-- chain represent ##STR3## and n=2-6; (ii) pyridyl, in which case the --W--V-- chain represents --N.dbd.N--and n=1-6, and acid addition salts of those derivatives (I) which are salt-forming.These derivatives are of use in therapy as agents for inhibiting type B monoamine oxydase.

Abstract: Pharmaceutical or veterinary preparations containing (a) at least one compound with the formula: ##STR1## where:R.sub.o represents a C.sub.3 -C.sub.6 alkyl group or a benzyl group with the formula: ##STR2##in which R.sub.3 =H, a halogen, a C.sub.1 -C.sub.4 alkyl, a C.sub.1 -C.sub.4 alkoxy, CF.sub.3, NO.sub.2 or a CN group; andR.sub.2 represents:a C.sub.1 -C.sub.4 alkoxy group, in which case the pair (X, R.sub.1)=(O, OH), (O, C.sub.1 -C.sub.4 alkoxy), (CHOH, H), (O, H), (CH.sub.2, H) or (CO, H);and OH group, in which case the pair (X, R.sub.1)=(O, OH), (O, C.sub.1 -C.sub.4 alkoxy), (O, H) or (CH.sub.2, H), with the reservation that when (X, R.sub.1)=(O, OH), R.sub.o is different from a C.sub.3 -C.sub.6 alkyl or a benzyl group; ora CN or C.sub.1 -C.sub.4 alkyl-NH group, in which case the pair (X, R.sub.1)=(O, H) or (CH.sub.2, H), together with (b) a carrier or vehicle which is physiologically acceptable and appropriate for the compound used.