Single-dish spectra around 227 GHz of the hot core G327.3-0.6 (top; observed with APEX; Bisschop et al. 2013, in prep.), the hot corino IRAS 16293-2422 (middle; observed with IRAM 30 m; Caux et al. 2011), and R CrA IRS7B (bottom; this work). The labels in the upper plot correspond well to the lines also seen in the middle plot. The colours denote oxygen-bearing (purple), nitrogen-bearing (blue), sulphur-bearing (yellow), and typical WCCC and PDR (red) species. (A colour version of this plot is available in the online Journal.)