The 13.6–17.7 μm wavelength range of the J1615 spectrum. The continuum-subtracted JWST-MIRI data (black, top panel) is overlaid with the total modeled emission (red, top panel) from the component molecules (bottom panel): H₂O (blue), HCN (orange), C₂H₂ (yellow), ¹²CO₂ (green), ¹³CO₂ (purple), OH (pink), ¹³C¹²CH₂ (red). Based on our detection criteria (see Section 3.1), we consider all fitted species positive detections. The detected bright H I, H₂, and atomic emission lines are labeled with dashed lines.