They have come up with numerous schemes for detecting low concentrations of various compounds, but few work for a wide array of compounds. (sciencemag.org)
Your cells release various compounds into your bloodstream that keep inflammation going when you don't actually need it. (vegetariantimes.com)
The answers were around the room on various compound chemistry posters, although you could do this using laptops, with students finding the answers on the compound interest website! (tes.com)