Lubricant

A lubricant containing between 20 and 99.9% by mass of one or more compounds of the general formula 1

• wherein
• X denotes H, F, Cl, —CH3, —C2H5, —OCH3,
• R1 respectively denote independently of each other H, an alkyl residue having a total of between 1 and 18 C-atoms, in which also one or two non-adjacent CH2 groups can be replaced by —O—, —S— or —CO— and two adjacent CH2 groups can be replaced by —COO— or —OOC—,
• R2 respectively denote independently of each other an alkyl residue having a total of between 1 and 18 C-atoms, in which also one or two non-adjacent CH2 groups can be replaced by —O—, —S— and two non-adjacent CH2 groups can be replaced by —COO— or —OOC—, or the residue
• with the above-specified significances for X and R1 and wherein n is a number between zero and 12 and q is zero or 1.