Contour plot of CN J = 2−1 integrated emission between 15 and 45  km s^-1 (shadowed areas; Martín et al. 2012), with overlay of OH absorption at 50  km s^-1 at 1667 MHz. Three CN J = 2−1 blobs fall inside, or partly inside, of the OH-streamer, and one is immediately S of the tail. The lowest contour level of CN J = 2−1 emission is ~3σ, and ~4σ of OH. Sgr A^∗ is marked with a plus sign. The CN emission and the head and mid parts of the OH-streamer are seemingly parallel to the Galactic plane.