Diterpene

Diterpenes are a class of terpenes composed of four isoprene units, often with the molecular formula C₂₀H₃₂. They are biosynthesized by plants, animals and fungi via the HMG-CoA reductase pathway, with geranylgeranyl pyrophosphate being a primary intermediate. Diterpenes form the basis for biologically important compounds such as retinol, retinal, and phytol. Some diterpenes are antimicrobial and anti-inflammatory.