The present invention provides a toner: comprising a binder resin comprising a polyester unit, a colorant, a releasing agent, and inorganic fine particles; has a weight average particle diameter of 3. The memory accessing agent generates a plurality of accesses to a memory. Provision is also made for a positive load on the cutting tool to reduce or eliminate tool vibration, as well as a chip shield that deflects debris away from the workpiece. The chassis unit is provided with a vertical guide shaft that is inserted into the guide hole when lifting the magazine upper section. The focusing lens focuses the diffraction grating on an interrogation volume which has the particles whose movement is to be detected. The invention also relates to the process for optically purifying -CMH and to the process for isolating -CMH from the mother liquor.