The chemical formula C15H10O5 (molar mass : 270.23 g/mol, exact mass : 270.052823) may refer to: * Trihydroxyflavones: * Apigenin (5,7,4'-trihydroxyflavone) * Baicalein (5,6,7-trihydroxyflavone) * Galangin (3,5,7-trihydroxyflavone) * Norwogonin (5,7,8-Trihydroxyflavone) * 7,8,3'-Trihydroxyflavone * Aloe emodin, an anthraquinone * Emodin, a purgative resin * Genistein, an isoflavone * Morindone, an anthraquinone dye * Thunberginol A, an isocoumarin * Thunberginol F, a natural benzofuran