Total spectra of the GUAPOS project in black. In blue, we show the synthetic spectrum of the best fit of methyl formate (MF); in green the synthetic spectrum of the best fit of glycolaldehyde (GA); in pink the synthetic spectrum of the best fit of acetic acid (AA). The colored triangles indicate the transitions used to constrain the fitting procedure of the 3 different molecules. Closer views of those transitions are given in Figs. 5–7.