By Dr. Priyom Bose, Ph.D. Reviewed by Lauren Hardaker Sep 3 2025 Researchers discovered three novel coffee diterpene esters, named caffaldehydes A, B and C, in roasted Arabica beans with strong blood sugar–lowering activity. Using advanced NMR and LC-MS/MS, the team also identified three additional novel trace diterpenes, highlighting coffee’s hidden role as a functional food. Study: Bioactive oriented discovery of diterpenoids in Coffea arabica basing on 1D NMR and LC-MS/MS molecular network .