Integrated emission maps (moment 0) of the selected molecular lines (indicated in each panel and in Table 4). Dashed magenta contours represent the molecular line emission at the following levels (in Jy beam⁻¹ km s⁻¹): 0.1, 0.3, 1, and 4 (CH₃CN), 0.05, 0.10, 0.20, 0.50, and 0.65 (CH₃CCH), 0.04, 0.1, 0.25, 0.6, 1.3, and 3 (HC₃N), 0.05, 0.2, 0.5, 1.2, and 3 (H₂CS), 0.1, 0.3, 0.6, 1.5, and 5 (CH₃OH), 0.05, 0.2, 1, and 3 (HNCO), 0.02, 0.04, 0.08, and 0.16 (CN), 0.07, 0.12, 0.2, 0.4, 0.6, 1.2, 2, and 3 (C³⁴S), and 0.5, 1, and 2 (HDO). The integration velocity interval ranges from −67 to −61 km s⁻¹ for all molecular lines, except for H₂CS and CH₃OH (−67 to −62 km s⁻¹) and for HNCO (−67 to −63 km s⁻¹). The green contours represent the continuum emission at 340 GHz with levels at 1, 10, 30, 60, 90, and 140 mJy beam⁻¹. The beams of 340 GHz continuum and line emissions are indicated in the bottom left corner.