Process for the optical resolution of the compound of formula :by chiral chromatography. Color errors appear as a blinking or flickering feature in the viewing monitor. A phase insensitive quadrature nulling method is utilized for each of the two vibrating accelerometers. The mold sections are housed in a two part flask that was initially used to fabricate the mold sections. Therefore, the security protection on the Un interface is more comprehensive, and the security protection requirements of data borne over different RBs can be met.