Line integrated intensity map of H₂CO 3_0,3 − 2_0,2 of ISOSS J22478+6357 (left panel) and ISOSS J23053+5953 (right panel). The integrated intensity of the transition with a threshold of S∕N ≥ 3 is presented in color scale. The line intensity is integrated from a velocity of v_LSR − 3 km s⁻¹ to v_LSR + 3 km s⁻¹. It is marked if the transition is detected (√) or not (×), further explained in Sect. 4.2.1. The NOEMA 1.3 mm continuum data are shown in pink contours. The dotted pink contour marks the − 5σ_cont level. Solid pink contour levels are 5, 10, 20, 40, and 80σ_cont. All mm cores identified in Beuther et al. (2021) are labeled in pink. Positions with a peak in molecular emission, but no associated continuum (“molecular peaks”, MP) are indicated by orange circles (Sect. 4.2.1). Jet-like structures, seen in SiO 5− 4 emission, are indicated by orange ellipses (Fig. 7). The synthesized beam of the continuum data is shown in the bottom left corner. The synthesized beam of the spectral line data is similar. A linear spatial scale of 0.1 pc is indicated bya black scale bar.