Compounds of the formula : in which R, R1, R2 and R3 are as defined in the description, the use thereof for the treatment of dyslipidaemia, atherosclerosis and diabetes, pharmaceutical compositions comprising them, and processes for the preparation of these compounds. In one embodiment, an illuminating beam illuminates a sample, such as a semiconductor wafer, to generate a reflected beam. The result is a more controllable doping profile of the N-type dopant below the trench. The pixel is determined to be the pixel reflecting the land surface 4 from a pixel value in the another imaging date and time that is determined to be data having a close temporal relevance in a relationship between a solar position and the predetermined time of the production standard date.