Notes.^(a) The transition parameters are quoted from the JPL (Pickett et al. 1998) and CDMS (Endres et al. 2016) database through Splatalogue². The columns from the left to right list the names of molecules (Mol.), transition quantum numbers (Trans.), rest frequency (Freq.), line strengths (S_ijμ²), upper-level energies (E_up), and some notes (Note). The unit of S_ijμ² is Debye² (denoted as D²). Note that transitions of molecules that have been covered by the observations but were not used in this work are not listed. ^(b) For both the upper and lower levels, the transition labels for SO and SO₂ are N_J and $J_{K_a,K_c}$, respectively.^(c) Only the targets relevant to this work are listed. IRS 63 represents Oph IRS 63.^(d) The S/Ns are measured from spectra extracted at the emission peaks for the corresponding targets listed in the sixth column, under the native angular and spectral resolution, when cleaned with a “robust” parameter of 0.5. The S/Ns can be improved through smoothing. The symbol “–” indicates non-detection. ^(e) The total fluxes and their uncertainties for the corresponding targets listed in the sixth column, obtained by applying Gaussian fitting to the integrated spectrum over the whole emission region.