Same selection of some of the strongest 15 lines of CHD₂OH out of the 105 used for synthetic spectral fitting as in Fig. 1, but now for source A. The observed spectrum is in dark blue, the best-fitting synthetic spectrum of is in pink. The reference spectrum is in turquoise. It is to note that the reference spectrum belongs to source B (shown to check for blending and to facilitate a comparison with Fig. 1). The rest frequency, E_up (K), A_ij (s⁻¹), and optical depth (for the best-fitting parameters) are shown in the right corner of each panel. The rest frequency is indicated with a vertical dashed line, and the filled yellow re- gion corresponds to the uncertainty on that line frequency. The lines at 353.934, 353.983, 355.788, and 359.948 GHz are in fact overlapping double transitions.