Tentative detection of HCN and upper limits on C₂H₄, C₃H₈, C₆H₆, CO₂, and HC₃N. For each species, the number in parentheses indicates the factor by which the nominal profile from Lavvas et al. (2021) has been multiplied. In all panels, model excluding (resp. including) the considered species is shown in blue (resp. in red). In the first panel (HCN), observation minus model residuals are also shown.