Low spatial resolution interferometric map of the NaCN stacked emission of the transitions at λ 3 mm presented in Table 1. In the upper left corner of each panel we note the v_LSR of the channel (V_sys = −26.5 km s^-1). The lowest contour corresponds to a value of 3σ, and the rest of the contours are equally spaced in jumps of 2σ with respect to the first contour. The rms of the map is σ = 0.8 mJy beam^-1. The beam size is drawn in the last panel. The HPBW is 4.′′3 × 2.′′6 with a PA of 72°.