Emission associated with Regions 1 and 2 (see Fig. 3b). The panels show contours and grey scale of ∫T_mbdv (except for ¹²CO(2−1): ∫dv), where the integration was performed between  − 23 and  − 14 km s^-1. The molecule and transition are indicated in each panel. The white circle marks the location (but not the size) of the UC H ii region and the embedded cluster. The filled black circle marks the beam size. Offset (0, 0) as in Fig. 3. Contour values are in K km s^-1 and are given below in the format lowest (step) highest. a)¹³CO(1−0); contours: 2(2)26. b)¹³CO(2−1); contours: 2(2)10 and 14(4)50. c) C¹⁸O(1−0); contours: 0.5(0.3)1.7. d) C¹⁸O(2−1); contours: 0.9(0.6)6. e) CS(2−1); contours: 0.4(0.25)2.3. f)¹²CO(2−1); contours 5(5)110.