Absorption profiles of H₂CO, CS, and SO are overlaid by individual best fit Gaussian components (black dotted line) and the sum of best-fit Gaussians (black solid line). Black vertical lines indicate the velocities of line absorption by Sgr B2 at +64 and +82  km s^-1, and colored lines are located at −106, −73.5, −40, and +3  km s^-1. In the profile of SO, the black dashed-dotted line indicates the 8–8 transition of CH₃OH at +64  km s^-1, which appears in emission.