C11H8O3

The molecular formula C11H8O3 (molar mass: 188.18 g/mol, exact mass: 188.0473 u) may refer to:


 * 3-Acetylcoumarin
 * Hydroxynaphthoic acids
 * 2-Hydroxy-1-naphthoic acid
 * 3-Hydroxy-2-naphthoic acid
 * Plumbagin, or 5-hydroxy-2-methyl-1,4-naphthoquinone