Similar to Fig. B.1 but towards G1.87−SMM 14, 16, 17, 21, 24. The contour levels start at 3σ for SiO, HN¹³C, C₂H, and HC₃N. For HNCO(4_0, 4 − 3_0, 3), HCN, HCO⁺, HNC, and N₂H⁺, the contours start at 8σ, 8σ, 5σ, 5σ, and 5σ, respectively. In all cases, the contours go in steps of 3σ. The average 1σ value in T_MB units is ~ 0.78 K km s^-1. The LABOCA 870 μm peak positions of the clumps are marked by red plus signs. The 870 μm peak of SMM 17 (west of SMM 21) lies just outside the MALT90 map (cf. Fig. 1, middle left panel). A scale bar indicating the 1 pc projected length is indicated. The HCN and HNC emissions show some morphological similarities.