Representative maps for lines of CH OH 8_3,6 − 9_2,8 (ν = 347.865 GHz; E_up = 143 K) and 17_1,17−16_2,15 (ν = 344.802 GHz; E_up = 345 K) in panels a and b, respectively, and CH₂DOH 7_5,2∕3 − 8_4,5∕4 (ν = 346.43471 GHz; E_up = 176 K) and 17_2,15−16_3,14 (ν = 355.077 GHz; E_up = 364 K) in panels c and d, respectively. In all panels, the integrations were performed over ± 0.5 km s⁻¹ around the systemic velocity and the contours shown at 3σ, 6σ, 9σ and 12σ (blue contours) and from there upwards in steps of 6σ (red contours).