Two-color image toward G20.0-0.2 in Galactic coordinates. In red with contours: emission of the ¹³CO integrated every 1.05 km s^-1 in the velocity range between 62 km s^-1 and 71 km s^-1 (contour levels are 2.7, 4.0, and 5.3 K km s^-1). In green: radio continuum emission of G20 at 20 cm. We have marked the two molecular clumps A and B that form the MC probably interacting with the SNR. A third clump (C) appears in the direction of the flattest border of G20 but is not in contact with the remnant.