Integrated intensity maps of the dense gas tracers HCN(4–3), HCO⁺(4–3), and CS(7–6) in the panels from left to right, with the CO contours overplotted. HCN and HCO⁺ present clumpy emissions along a radius of ∼3″, coinciding with the star-forming ring. All the dense gas tracers are detected in the very center as nuclear compact decoupled disks, or molecular tori as discussed in Paper I. The purple circles indicate the position of a clump detected in the HCN, HCO⁺, and CS emission and used to calculate the ratios in the submillimeter diagram in Fig. 12. The synthesized beam sizes are shown in red in the bottom left corner of each panel.