The use is described of a compound of the formula (I) or (ent-I) or a
blend consisting of two, three or more compounds of the formula (I) or
(ent-I)
(a) as a cooling substance for non-therapeutic purposes or(b) for the
production of a medicament,wherein in each of the formulae (I) and
(ent-I)R1, R2, R3, R4 and R5 mutually independently in each case mean
hydrogen or a linear, branched or cyclic, saturated or unsaturated
hydrocarbon residue having 1 to 4 carbon atoms.