Absorption lines of H₂NC and H₂CN observed with the Yebes 40 m telescope towards PKS 1830−211. We assume aredshift of z = 0.885875 to compute the rest frequency. The y-axis is the intensity normalized to the total continuum level. The red lines are the synthetic spectra computed for one component, while in the H₂CN spectrum, the blue line corresponds to an additional component and the green line to the sum of the two components. See more details in Tercero et al. (2020).