The current invention is directed towards mixtures of compounds, comprising (A) in the range of from 93 to 97% by weight compound of general formula (I) (B) in the range of from 3 to 6.5% by weight compound of general formula (II) (C) in the range of from 0.2 to 0.5% by weight compound of general formula (III) wherein the integers are defined as follows: R1 is —(CH2)nCH3, R2 is —(CH2)n+2CH3, R3 is —(CH2)n+1CH(CH3)2, R4 is —(CH2)n−1CH(CH3)2 G1 selected from monosaccharides with 4 to 6 carbon atoms, x in the range of from 1.1 to 10, n is a number in the range of from 1 to 4.