Absorption profiles of OH are shown in blue. 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. Hyperfine or A/E structure for each of these velocity components is indicated by dotted vertical lines of the same color. The data are overlaid by individual Gaussian components fit (black dotted lines), and by the total fit to the profile (black solid line).