ALMA 0.′′2 resolution integrated emission maps at 1.4 mm of HC(O)NH₂ (10_1,9–9_1,8) (top-left panel), CH₃NCO (25_2,23,0–24_2,22,0 and 25_−3,−,1–24_−3,−,1) (top-right panel), HNCO (10_3,8–9_3,7 and 10_3,7–9_3,6) (bottom-left panel), and HNCO (10_1,9–9_1,8) (bottom-right panel) in a velocity range between 93 and 100 km s⁻¹ for each transition. The contour levels are 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, and 0.9 the maximum value of the maps. The maximum values of the maps are 1.625 Jy beam⁻¹ km s⁻¹ for HC(O)NH₂, 0.877 Jy beam⁻¹ km s⁻¹for CH₃NCO, 1.082 Jy beam⁻¹ km s⁻¹ for HNCO at219.656 GHz, and 1.396 Jy beam⁻¹ km s⁻¹ for HNCO at 220.585 GHz. The black dashed circle indicates in all the panels the area in which the spectrum analysed in this work was extracted, which matches the GUAPOS beam of 1.′′ 2 centered at the 3mm continuum peak. The frequency and E_up energies of the transitions are shown in blue above each panel, and in red in the top-right corner of each panel, respectively.The synthesised beam is represented by the grey ellipse in the lower left corner. The black squares indicates the position of the continuum sources A, B, C, and D resolved with 7 mm VLA observations by Beltrán et al. (2021).