SINFONI K-band spectrum detected toward the WF IRAS 18043−2116. The Q-branch and low-energy S-branch H₂ ro-vibrational transitions dominate the spectra. No energetic H₂ ro-vibrational lines were detected, neither Br_γ emission lines nor He recombination lines. The bottom panels display the ro-vibrational lines H₂ 1–0 S(1), H₂ 1–0 S(0), and H₂ 2–1 S(1). A simple sum of two Gaussian functions was implemented to fit and then estimate the FWHM of each spectral feature.