Radial profiles of the column density for the observed molecules. The solid blue lines refer to the value extracted for an excitation temperature of T_ex = 30 K, while the ribbons show the uncertainty, which takes into account the propagated uncertainty on the flux density and the systematic uncertainty on the excitation temperature, which has been varied between 20 and 50 K (Facchini et al. 2021). The 10% absolute flux calibration uncertainty is not included. The horizontal dark blue line shows the disk-averaged value, listed in Table 2. The dashed black line shows the azimuthally averaged radial profile of the 855μm continuum emission (Isella et al. 2019). Hatched regions indicate the beam major axis of the cubes.