Mixture comprising or consisting of a) one or more monocyclic monoterpenes of formula with R1 = hydrogen, hydroxy group or carbonyl group, R2 = hydrogen, hydroxy group or carbonyl group, R3 = 0, hydrogen or hydroxy group and R4 = isopropyl group, isopropenyl group or isopropylidene group as well as without or with one, two or three double bonds in the cyclic system, preferably selected from the group consisting of gamma-terpinene, alpha-terpinene, beta-terpinene, beta-phellandrene, limonene, thymol, pulegone, carvacrol and alpha-phellandrene, b) one or more benzoic acid derivatives of formula with R1, R2 and R3 independently of each other selected from the group consisting of hydrogen, hydroxy group and methoxy group, c) a first 3-phenylpropenoic acid derivative of formula with R1 = 1-carboxy-2-(3,4-dihydroxyphenyl)ethyl, R2 = hydrogen and R3 = hydrogen, optionally a second 3-phenylpropenoic acid derivative of formula with R1 = 5-carboxy-2,3,5-trihydroxycyclohexyl, R2 = hydrogen and R3 = hydrogen, and optionally a third 3-phenylpropenoic acid derivative of formula with R1 = hydrogen, R2 = hydrogen and R3 = hydrogen, d) tartaric acid (formula) D-(-)-form, and/or L-(+)-form, and/or meso-form e) citric acid (formula) and/or malic acid (formula) f) glucose, fructose and/or sucrose, g) 1,2-propanediol and/or 1,3-propanediol and/or propane-1,2,3-triol h) water, i) optionally gallocatechin (Formula) (2R,3S)-3,4-dihydro-2-(3,4,5-trihydroxyphenyl)-2H-1-benzopyran-3,5,7-triol j) optionally one or more further flavouring substances, and k) optionally one or more further solvents, preferably selected from the group consisting of triacetin, isopropanol (iPr), isopropyl myristate, ethanol, dipropylene glycol and triethyl citrate, wherein the mixture comprises or consists of, with regard to the total weight of the mixture, respectively, 0.0001 to 80 wt.-% of component a), 0.0001 to 1.5 wt.-% of component b), 0.0001 to 3 wt.-% of component c), 0.005 to 10 wt.-% of component d), 0.005 to 10 wt.-% of component e), 0.000005 to 25 wt.-% of component f), 0.0001 to 98 wt.-% of component g), 0.0005 to 95 wt.-% of component h), 0.0001 to 1 wt.-% of component i), if present, 0.005 to 95 wt.-% of component j) if present, and 0.01 to 95 wt.-% of component k),if present. a) one or more monocyclic monoterpenes of formula with R1 = hydrogen, hydroxy group or carbonyl group, R2 = hydrogen, hydroxy group or carbonyl group, R3 = 0, hydrogen or hydroxy group and R4 = isopropyl group, isopropenyl group or isopropylidene group as well as without or with one, two or three double bonds in the cyclic system, preferably selected from the group consisting of gamma-terpinene, alpha-terpinene, beta-terpinene, beta-phellandrene, limonene, thymol, pulegone, carvacrol and alpha-phellandrene, b) one or more benzoic acid derivatives of formula with R1, R2 and R3 independently of each other selected from the group consisting of hydrogen, hydroxy group and methoxy group, c) a first 3-phenylpropenoic acid derivative of formula with R1 = 1-carboxy-2-(3,4-dihydroxyphenyl)ethyl, R2 = hydrogen and R3 = hydrogen, optionally a second 3-phenylpropenoic acid derivative of formula with R1 = 5-carboxy-2,3,5-trihydroxycyclohexyl, R2 = hydrogen and R3 = hydrogen, and optionally a third 3-phenylpropenoic acid derivative of formula with R1 = hydrogen, R2 = hydrogen and R3 = hydrogen, d) tartaric acid (formula) D-(-)-form, and/or L-(+)-form, and/or meso-form e) citric acid (formula) and/or malic acid (formula) f) glucose, fructose and/or sucrose, g) 1,2-propanediol and/or 1,3-propanediol and/or propane-1,2,3-triol h) water, i) optionally gallocatechin (Formula) (2R,3S)-3,4-dihydro-2-(3,4,5-trihydroxyphenyl)-2H-1-benzopyran-3,5,7-triol j) optionally one or more further flavouring substances, and k) optionally one or more further solvents, preferably selected from the group consisting of triacetin, isopropanol (iPr), isopropyl myristate, ethanol, dipropylene glycol and triethyl citrate, 0.0001 to 80 wt.-% of component a), 0.0001 to 1.5 wt.-% of component b), 0.0001 to 3 wt.-% of component c), 0.005 to 10 wt.-% of component d), 0.005 to 10 wt.-% of component e), 0.000005 to 25 wt.-% of component f), 0.0001 to 98 wt.-% of component g), 0.0005 to 95 wt.-% of component h), 0.0001 to 1 wt.-% of component i), if present, 0.005 to 95 wt.-% of component j) if present, and 0.01 to 95 wt.-% of component k),if present.