Illustration on how to use LIDA to interpret astronomical observations. Top: LIDA entries to search for molecules sharing CO and CH chemical bonds. Middle: selected experimental data scaled to the water-silicate-subtracted spectra of the protostar HH46. Bottom: molecules representing the pure ices used to match the HH46 spectrum. The ellipses indicate which part of a molecule is responsible for a specific absorption band, and the colors follow the same color-code used in the middle panel.