X/CS(1–0) intensity ratios in the full velocity range shown at the bottom of the figure. X stands for SiO(2–1), H¹³CO⁺(1–0), HN¹³C(1–0), HNCO(5–4), and C¹⁸O(1–0), whose emission is shown in contour levels. Intensity ratios have been derived considering only pixels with emission above the 3σ level. The wedge to the right shows the color scale of the intensity ratios. Contour levels are −3σ (dashed contour) and from 3σ in steps of 4σ (3.9 and 5.2 K km s^-1 for SiO/H¹³CO⁺/HN¹³C and HNCO/C¹⁸O ratios, respectively).