Final abundances reached at the end of each simulation run for the targeted species. The dashed blue line shows the observed abundance of the species towards IRAS 16293B. The error bars and the blue area correspond to one half order of magnitude confidence limit, thus a 1σ-difference between observations and simulations corresponds to one order of magnitude. The dashed blue region represents the abundance values that are consistent with the corresponding upper limit. The abundance scale of C₃ O is lower than the other plots. The abundance upper limit of HC(O)CHO is < 2.6 × 10⁴ relative to CH₃OH, therefore, there is no observational constraint on the abundance of HC(O)CHO. The abundance upper limit of C₃ H₇OH is the sum of n-C₃H₇OH and i-C₃H₇OH abundance upper limits.