Spectrum of the ATCA 7 mm survey toward PKS 1830 − 211. The grey envelope indicates the 3σ noise level. The LTE synthetic model, assuming T_rot = 5.14 K for all molecules, is overlaid in red. The spectrum in magenta, offset at a level of 0.995, gives the relative differences between observations taken in September 2009 and March 2010, normalized to the average spectrum. The corresponding scale is given on the right of each box (±5%). Some non-detections are indicated in light blue.