continued. Molecular line emission images of the inner 40′′ (1.6 pc) at a resolution of about 0.7′′× 0.6′′. Top row (from left to right): ¹³CS(2–1), N₂H⁺(1–0), and CH₃OH(8–7) as in Fig. 4, but zoomed in. Bottom row (from left to right): CH₃OH(7–6) and SiO(8–7), both at resolutions of 0.5′′× 0.5′′, and CS(5–4) as before. The contours show the CS(5–4) emission at the levels of [4, 8, 12, 18, 24, 30, 36, 48, 60, 72, 84] ×σ (=0.08 Jy beam^-1 km s^-1) for comparison. except from bottom right image, which is overlayed with the CN(2–1) emission as in Fig. 4. The inner rim of the CND is detected (cf. Fig. 1) toward the edge of the FOV10 of the band 6 and 7 emission lines.