Novel sulphonamide derivatives having CNS activity, processes for their preparation and their use as medicaments are disclosed. One class of such a material is built up from triptycene base moieties wherein three benzene rings are bridged together about a 2. The micro fluid flow paths are constructed radially inwardly to a concentration area in the mixing chamber. In one embodiment, the SDRAM also includes address and compare logic to prevent reading incorrect data from an address to which the proper data has not yet been written.