The present invention relates to 1,3,5-tricyano-2,4,6-trisbenzene derivatives and method for preparing the same. Each link performs an acquisition routine in which its light beam is swept through a pre-defined pattern while transmitting its beam alignment information. In this way, the MSs within the wireless network can be designed to decode with the use of only a single space-time encoding matrix, this space-time encoding matrix working for BTSs with various numbers of antennas. A second operational amplifier has a non-inverting input coupled to a single-ended input node, an inverting input coupled to a first reference current source, and an output coupled to the gate of the second MOS transistor. 4% by weight of the cement of the polymer.