The invention relates to compounds of formulawherein the substituents are as described in claim 1. Upon receiving, in a peripheral device, a work item that is associated with a given process, having a respective address translation table in the host memory, and specifies a virtual memory address, the peripheral device translates the virtual memory address into a physical memory address by accessing the respective address translation table of the given process in the host memory. The track further comprises reference elements, e. % of a saturated or unsaturated, linear or branched alcohol with 8 to 36 C-atoms, 0. A first reference signal is provided.