Extracted spectrum centred on the rest frequency of the CH₃OCHO 19(4,15)−18(4,14) A transition at 246.9147 GHz with dashed lines showing the predicted locations of the velocity components assuming similar V_LSR to methanol components (−2, 2.8 and 9.9 km s⁻¹). The locations of the same velocity components (−2, 2.8 and 9.9 km s⁻¹) in HDCO 4(1,4)−3(1,3) are shown by the pink dashed lines. The −2 km s⁻¹ component of CH₃OCHO 19(4,15)−18(4,14) A is blended with the 9.9 km s⁻¹ component of HDCO 4(1,4)−3(1,3).