Compounds useful for the treatment of pain in accord with the following structural diagram,wherein R1, R2 and R3 are any of a number of groups as defined in the specification and pharmaceutical compositions and methods of treatment utilising such compounds. The method includes providing a pattern and securing at least one core to the pattern. The upper substrate includes a light transmittable layer within the non-display region of the upper substrate, and the light transmittable layer has a transmittance at a specific wavelength of light. Of the produced packet signal, the baseband processing unit multiplies the dedicated known signal and a data signal assigned posterior to this dedicated known signal by the dedicated weight vector, and of the produced packet signal it multiplies a part by which no dedicated weight vector is to be multiplied, by a common weight vector. The method of virtualizing hardware resources may be applied to any resource mapped across the bus, including memory address space, and IO address space.