Summary of dust and gas detections in the sample. The green square refers to a firm detection, the yellow square indicates a tentative detection, and the light gray square indicates a non-detection. The top panel shows the number of detections for each species. The right panel shows the number of species of two groups detected in each source. The inorganic species (dark gray) include H₂, H₂O, HI, CO, CO₂, ¹³CO₂, [Ne II], and OH. The organic species (faded red) include all the hydrocarbons and cyanomolecules. The hatched region in the top and right panels shows tentative detections.