Overview of the main molecular absorption features detected toward B1-c in the MIRI-MRS wavelength range. In each panel, the baseline-subtracted spectrum is shown in black and the best-fit LTE model including all molecules listed is overlaid as the shaded red area. At the bottom of each panel, the individual best-fit LTE models of all molecules contributing to the corresponding wavelength range are displayed at an arbitrary constant offset, with each color denoting a different species. The surprising detection of NH₃ toward B1-c is highlighted in Fig. 5.