Column density ratios of CH₃NH₂ with respect to CH₂NH (purple), NH₂CHO (gold), and CH₃CN (turquoise) for NGC 6334I, model predictions and other objects. For the regions in NGC 6334I, shaded bars indicate the range of ratios derived based on the ¹³CH₃CN and CH₃C¹⁵N isotopologues. For the models, the shaded bars indicate the range of rations derived for the fast, medium and slow models respectively. References. ^(a)Garrod (2013); ^(b) Belloche et al. (2013); ^(c)Neill et al. (2014); ^(d)Halfen et al. (2013); ^(e)Pagani et al. (2017), Laurent Pagani, priv. comm.; ^(f)Ligterink et al. (2018); ^(g)Goesmann et al. (2015).