Maps of the entire area observed of various molecular-line emissions, color-coded by the velocity-integrated line intensity. Regions where the velocity-integrated line intensity is lower than 3σ are marked by blank pixels, while the typical RMS is represented by the lowest values of each map. Each panel in the figure corresponds to a different molecular line, as indicated by the title. The galaxy’s center is marked by a red star and the gray squares denote positions with no available observational data. Contours are drawn at 50%, 60%, 70%, 80%, and 90% of the maximum of the peak main-beam temperature (T_peak) for each line.