C20H18O5

The molecular formula C20H18O5 (molar mass : 338.35 g/mol, exact mass : 338.115424 u) may refer to:


 * Desmethoxycurcumin, a curcuminoid
 * Glyceollin I, a pterocarpan found in soybeans
 * Glyceollin III, a pterocarpan found in soybeans
 * Wighteone, an isoflavone found in Maclura aurantiaca