Abundance ratios of complex species with respect to CH₃OH for oxygen-bearing species and HNCO for nitrogen-bearing species. The black bars indicate abundance ratios calculated with the CH₃OH and HNCO column density derived from the RTD analysis similar to BIS07. The red and blue bars indicate abundance ratios where CH₃OH and HNCO column densities are derived from CASSIS or Weeds (HNCO) model, respectively. Upper limits are marked with arrows.