Total line luminosity (first column) and absolute and relative line luminosities [K km s ⁻¹ pc²] for selected species in the different regions. A region’s relative size is given in the brackets beside its name.Regions are generally not disjointed, but overlap to varying degrees. Additionally, rounding uncertainties for both intensities and region sizes accumulate and slightly different detection limits apply for each region. Hence the percentages do not add up to 100% and should be considered as estimates. ^(*) Approximated as describedin Sect. 4.1.