Total integrated intensity (−200 to 200  km s^-1) of antenna temperature of SEST observations of C¹⁸O J = 2−1 towards the Sgr A complex. Sgr A* is marked with a red star, and the large circles mark the main positions of the +50  km s^-1 cloud (1), the CND (5), and the +20  km s^-1 cloud (7). The red lines and letters indicate the directions of position-velocity diagrams discussed in Sects. 3.5.2, and 3.5.3, and the Roman numerals refer to objects discussed in the same sections. The black line G−H indicates the position of the velocity cut shown in Fig. 14. The grey contour line delineates the Sgr A East 18-cm continuum emission at 0.15 Jy/beam (Karlsson et al., in prep.). The small grey circles, near Component I, indicate the positions of the four compact H ii regions (Ekers et al. 1983). The red triangles indicate positions of 1720 MHz OH Supernova Remnant (SNR) masers observed by Yusef-Zadeh et al. (1996, 2001), Karlsson et al. (2003), and Sjouwerman & Pihlström (2008). The red arc line indicates the expanding shell associated with the SNR (G359.92−0.09). Offsets in the map are in arcseconds in the equatorial coordinate system, and relative to the position of Sgr A*. The HPBW is 24′′.