a) Color image showing the integrated intensity map of the CH₃OH 8_-2 − 8₁ E line (E_up/k = 109.6 K, integrated from 5 to 11 km s^-1) for a synthesized beam of . Black contours represent the CH₂DOH 5_2,4 − 4_2,3 line emission (E_up/k = 48.4 K, integrated from 5 to 11 km s^-1) and run from 15% to 95% in steps of 10% of the peak intensity (1.0 Jy beam^-1 km s^-1) for a synthesized beam of . Black dashed contours correspond to –5% of the peak intensity. b) Color image showing the PdBI integrated intensity map of of the HDO 3_1,2 − 2_2,1 line (E_up/k = 167.6 K, integrated from − 8 to + 17 km s^-1) for a synthesized beam of . Black contours represent the SMA ¹³CH₃OH 12_1,11 − 12_0,12 A–+ emission (E_up/k = 192.8 K, integrated from 0 to 12 km s^-1, Tang, priv. comm.), running from 20% to 90% in steps of 10% of the peak intensity (316.6 Jy beam^-1 km s^-1) for a synthesized beam of . Black dashed contours correspond to –10% of the peak intensity. c) Integrated intensity map of the CH₃OD 5_-1 − 4_-1 E line (E_up/k = 37.3 K, from 5 to 11 km s^-1) overlaid with the CH₂DOH 3_1,2 − 2_0,2 o₀ line (E_up/k = 35.7 K, integrated from 5 to 11 km s^-1) in black contours for a synthesized beam of . Black contours run from 0.28 (2σ) to 1.12 Jy beam^-1 km s^-1 in steps of 0.14 Jy beam^-1 km s^-1, and black dashed contours correspond to − 0.07 Jy beam^-1 km s^-1. d) [CH₂DOH]/[CH₃OH] abundance ratio map for a resolution of . The [CH₂DOH]/[CH₃OD] abundance ratio is calculated by assuming the same excitation temperature (120 K) for both molecules. e) [CH₂DOH]/[CH₃OD] abundance ratio map for a resolution of . The [CH₂DOH]/[CH₃OD] abundance ratio is calculated by assuming the same excitation temperature (120 K) for both CH₂DOH and CH₃OD. Blue contours run from 0.4 to 1.0 in steps of 0.1. f) The black square marks the center of explosion according to Zapata et al. (2009). The positions of source BN, the Hot Core (HC), IRc6/7, and source I/n, and SMA-1 are marked by triangles. The positions of deuterated methanol emission peaks (dM-1, dM-2, and dM-3) and KL-W are marked by stars. The bipolar outflow of source I is indicated.