Integrated intensity maps of NH₂CHO, HNCO, and their isotopologues towards source B. The position of the continuum peak of source B is indicated with a red cross, while the position of where the spectrum was extracted is shown with a red circle. The beam sizes are shown in gray in the bottom right corner of each panel. The contour levels start for the main isotopologue of HNCO at 0.05 Jy km s^-1 with a step of 0.05 Jy km s^-1. For the other species, the levels are 0.02, 0.03, 0.04, 0.06, 0.08, 0.1, and 0.12 Jy km s^-1.