Transitions of CH₃OH used to produce the population diagram at position N1S. The observed spectrum is shown in black, the synthetic spectrum of the shown molecule in pink, and the cumulative Weeds model of all COMs, whose spectra have been modelled in this work, in turquoise. The vibrational state and the beam size of the respective spectral window are shown in the upper left corner. The frequency axis shows steps of 2 MHz. Transitions marked with pink stars in Figs. F.2–F.10 are not used for the population diagram.