.alpha.-Cycloalkenylphenyl-fatty acid nitriles

A member selected from the group consisting of compounds of the formula ##EQU11## in which Ph stands for a member selected from the group consisting of ortho-phenylene, ortho-phenylene substituted by a member selected from the group consisting of lower alkyl, lower alkoxy, halogen, trifluoromethyl, amino, nitro and hydroxy, para-phenylene and paraphenylene substituted by a member selected from the group consisting of lower alkyl, lower alkoxy, halogen, trifluoromethyl, amino, nitro and hydroxy, R stands for a member selected from the group consisting of 1-cycloalkenyl having 4-8 ring carbon atoms and 1-cycloalkenyl having 4-8 ring carbon atoms substituted by a member selected from the group consisting of lower alkyl, lower alkoxy, lower alkenyloxy, hydroxy, oxo, amino, mono-lower alkylamino, di-lower alkylamino, lower alkyleneamino, lower oxaalkyleneamino, lower thiaalkyleneamino and lower azaalkyeneamino and R.sub.1 and R.sub.2 each stands for a member selected from the group consisting of hydrogen, lower alkyl, lower alkenyl, lower alkinyl, phenyl-lower alkyl, phenyl-lower alkyl substituted by a member selected from the group consisting of lower alkyl, lower alkoxy, halogen and trifluoromethyl, phenyl-lower alkenyl and phenyllower alkenyl substituted by a member selected from the group consisting of lower alkyl, lower alkoxy, halogen and trifluoromethyl, and when taken together R.sub.1 and R.sub.2 stand for lower alkylidene.