Comparison of molecular abundances relative to methanol (CH₃OH, v_t=0) in the warm gas phase of our sample where G328.25 was chosen as a reference. The left panel shows G333.46, G320.23, and G335.78, the middle panel G343.75, and the right panel G335.58. The black solid line represents the one-to-one relation. The grey shaded region corresponds to a factor 5 scatter from the one-to-one relation. The dashed lines represent a factor 10 scatter from the one-to-one relation. Each molecule is displayed in a different colour.