Comparison of the interferometric spectra towards NGC 7129 – FIRS 2 (black line) with the single-dish spectrum of Orion KL (red line). The Orion spectra were provided by B. Tercero and J. Cernicharo and multiplied by a factor 0.43 for an easier comparison. The spectrum was observed towards: , (J2000) and is centered at a velocity of 7 km s^-1. Lines are labeled in red. When several lines are blended, only the most intense ones are indicated. The spectra synthesized with the parameters shown in Table 3 are in blue. The intensity scale is brightness temperature.