Central positions of selected COM transitions at different velocities. The top two panels show the integrated intensity map (left) and central positions (right) from CH₃CN (Hsieh et al. 2023) as a reference for the O-bearing COMs. The contours show the 1.3 mm continuum emission from Tobin et al. (2018). Different line transitions are marked with different symbols (Tables B.1-B.6). The scale bar is 0.″1 for the bottom six panels. The beam sizes for these COM emissions depend on the line frequency but are the same as that of CH₃CN (1.″2 × 077) within 10%.