Close-ups of the spectra of HD 37122, with the continuum removed. The bottom spectrum in each plot includes only the extended fringe flat, and the top spectrum both the extended fringe flat and the residual fringe correction. CO, SiO, and OH are overplotted. Bands 1B, 2B, and 2C are shown (from top to bottom). In the top panel some areas where the residual fringe correction reduces the match with the synthetic CO are highlighted.