Abundances of CH₃OH (blue), CH₂CO (black), CH₃CHO (red), CH₃COCH₃ (yellow), and C₂H₅CHO (orange) with respect to total H abundance during the collapse stage (a) and subsequent warm-up stage with fast (b), medium (c), and slow (d) timescales. The corresponding temperatures are indicated by the upper x-axis in each panel. The abundances in the gas phase and the solid phase are plotted in solid and dashed lines, respectively. The intersection of the solid and dashed lines in the same color (i.e., ice and gas abundances of the same species) corresponds to the sublimation of this species from ice to gas.