Zeroth moment maps of some simple molecules, and selected transitions of COMs. All contours correspond to significant emission and start at 20% of the maximum value and increase by 15% of the maximum value. Yellow star marks the position of the dust continuum peak corresponding to the central protostar. The beam is shown in the lower left corner. Labels indicate the shown molecular species. One figure shows the continuum as a reference, where the scale and contours are the same as in Fig. 1.