ALMA spectra of HC3N extracted from a beam centered 200 km above the south polar limb, including the (J = 39 − 38, v = 0) rotational transition of the vibrational ground state, the (J = 39 − 38, v7 = 1f) transition of the vibrationally excited state, and the ground-state rotational transitions of the detected 13C and 15N isotopologues (see Table 1).