Notes. Columns 3–10 give the local standard of rest (LSR) radial velocity (v_LSR), full width at half maximum (FWHM; Δv), peak intensity (T_MB), integrated intensity (∫ T_MBdv), optical thickness (τ), and excitation temperature (T_ex) of the line, and the molecule’s beam-averaged column density and fractional abundance with respect to H₂. The latter two quantities are given in the form a ± b(c), which stands for (a ± b) × 10^c. ^(a) A 3σ intensity upper limit is quoted for the non-detections. ^(b)For the non-detections, the upper limit was calculated by multiplying the quoted 3σ intensity upper limit by the broadest linewidth among the detected lines in the case of SiO and C₂ H, while for the H¹³CN non-detections the width of the HN¹³C line was used. ^(c)For the H¹³CN(2−1) and C₂ H(2−1) lines, the quoted optical thicknesses are the total optical thicknesses derived through fitting the hyperfine structure of the lines. For the sources where H¹³CN(2−1) or C₂ H(2−1) were not detected, we adopted the average T_ex[H¹³CN(2−1)] and T_ex[C₂H(2−1)] values (3.7 ± 0.4 K and 3.5 ± 0.1 K, respectively) derived from the detected H¹³CN and C₂H lines, and derived the optical thickness upper limits using those values. For all the other lines, the quoted value of optical thickness refers to the peak optical thickness. In case the line exhibits hyperfine structure, the latter value refers to the strongest hyperfine component. ^(d) Apart from the H¹³CN(2−1) and C₂ H(2−) lines, where T_ex could be derived from the optical thickness (Eq. (1)) the transition was assumed to be thermalised at the dust temperature of the clump (see Table 1). ^(e) The uncertainty of the derived optical thickness is larger than the nominal value. Hence, the uncertainty of τ was not propagated to the formal uncertainty of the corresponding T_ex value. ^(f)The line appears in absorption, and hence the quoted intensity upper limits should be interpreted as absolute values.