Spatial distribution of the molecules identified around Sgr B2(N3), Sgr B2(N4), and Sgr B2(N5). In each panel, the red star represents the position of the hot core derived from Fig. 1. Blue crosses represent the mean peak position for each species. Error bars correspond to the standard deviation weighted by the uncertainties given by the GAUSS-2D routine. The radius of the dashed circle is given in the top right corner. The average peak position of HC₃N, ν₇ = 1 is shown in green.