Line identification in the spectra of AT 2017jfs and a few comparison LRNe at three representative phases: a few days after the blue peak (top panel), around the red peak (middle panel), and at late phases (about 5−6 months after the blue peak; bottom panel). The spectra of the comparison objects are taken from Pastorello et al. (2019), Blagorodnova et al. (2017), and Kankare et al. (2015). The identification of the molecular bands is performed following Kirkpatrick et al. (1991), Valenti et al. (1998), Martini et al. (1999), and Barsukova et al. (2014).