Column density ratios of CH₃NH₂ (blue), NH₂CHO (red), and CH₃CN (green) with respect to CH₃OH for NGC 6334I, model predictions and other objects. For the regions in NGC 6334I, the shaded bars indicate the range of ratios derived using the ¹³C- and ¹⁸O-methanol isotopologues as base respectively. For the models, the shaded bars indicate the range of rations derived for the fast, medium and slow models respectively. For Sgr B2(N2–5), the shaded bars indicate the range of ratios derived for each of the components N2, N3, N4, and N5 (excluding the upper limit on NH₂CHO for N4). References. ^(a)Garrod (2013); ^(b) Belloche et al. (2013); ^(c)Neill et al. (2014); ^(d)Bonfand et al. (2017); ^(e)Crockett et al. (2014); ^(f)Ligterink et al. (2018).