Spectra observed with EMIR in IC 860 at 88 and 112 GHz. The intensity scale is in , not corrected for main beam efficiency. The region marked with (1 / 10), around the CO 1–0 line, has been scaled down by a factor 10. The main molecular transitions are labelled regardless of line detection. The C₂H 3/2 and 1/2 labels mark the limits of the C₂H multiplet at 87 GHz. Transitions of vibrationally excited HC₃N are labelled as v₇1e and v₇1f. The frequency scale is the observed frequency, not corrected for redshift.