COM abundance profiles with respect to CH₃OH to the south (S, a–b) and to the west (W, c–d) based on data from observational setups 1–3 (encircled symbols) and 4–5. Additional crosses on the markers indicate positions for which the velocity offset changed from ≲ 2 to ~7 km s⁻¹. Unfilled symbols with arrows indicate upper limits. Vertical dashed lines mark the distance from Sgr B2 (N1) beyond which the respective COM is no longer detected.