Herein described are novel mixtures, containing or consisting of a first compound (E) and a second compound (Z), wherein compounds (E) and (Z) are compounds of formula (I) with identical constitutional formula wherein it applies that one of the four wavy lines denotes a double bond and the remaining wavy lines denote a single bond, respectively, and X is selected from —O—, —CH2— and —O—CH2—, and the first compound (E) is trans-configurated and the second compound (Z) is cis-configurated, wherein the weight ratio of compound (E) to compound (Z) in the mixture is in the range of 10:90 to 65:30, preferably to 65:35, particularly preferably to 60:40, uses of such mixtures, methods for producing such mixtures as well as products containing such mixtures.