Observed spectrum of C¹⁸O J = 1−0 (black) overlaid by the respective Weeds models for both the outflow and hot-core components (orange) and the total Weeds model of all yet identified species at these positions (blue). For comparison, the grey spectrum shows the ethyl cyanide transition at 96.92 GHz scaled down by a factor 5 for N1SE1 and a factor 2 for N1NW3 (see also Fig. 5). The vertical black dashed lines mark the systemic velocities, while vertical red and blue dashed lines show the pixel-dependent inner limits used to integrate the blue-and red-shifted emission (see also Fig. 5). The grey horizontal line indicates the 3σ level, where σ = 0.23 K.