ALMA Band 8 nuclear spectrum of ESO 320-G030 (r= 03). Each panel shows one of the spectral windows where two HNCO transitions and CO(4–3) are detected (see Sect. 2.1). We note that part of the blue wing of the HNCO 21_1, 21 − 20_1, 20 transition (left panel) is not covered by the observed spectral window. The vertical dashed lines mark the expected frequency of the HNCO and CO transitions based on the systemic velocity. The green histogram in the right panel shows the nuclear CO(4–3) spectrum after subtracting the HNCO emission.