SiO(2–1) (black line) and HNCO(5–4) (thick blue line) selected spectra taken along the Northern Ridge (left column), Southern Streamer (middle column) and 50 km s^-1 Streamer (right column). In the maps at the top of Fig. 10, the areas where the spectra have been obtained can be seen as white open squares. Their numbers appear in the upper-left corner of each spectrum of the left column. The intensity of SiO(2–1) and HNCO(5–4) have been divided in some cases by a factor shown in the upper-right corner of the corresponding panel.