Transitions of NH₂CN, v = 0 covered by our ALMA survey. The synthetic spectrum of NH₂CN, v = 0 is displayed in red and overlaid on the observed spectrum of Sgr B2(N1S) shown in black. The blue synthetic spectrum contains the contributions from all molecules identified in our survey so far, including the species shown in red. The central frequency of each panel is indicated in MHz below its x-axis. Each panel has a width of 40 MHz, as indicated in brackets behind the central frequency. The angular resolution (HPBW) is also indicated. The y-axis is labelled in brightness temperature units (K). The dotted line indicates the 3σ noise level.