(organic chemistry) An acid, C₁₅H₂₀O₄, distinct from santoninic acid, obtained from santonin.

(organic chemistry) An acid, C₁₅H₂₂O₅, produced by long exposure to sunlight of santonin in acetic acid solution.

(organic chemistry) An acid, C₈H₁₂O₄, homologous with terebic acid, and obtained by oxidation of oil of turpentine with chromic acid.

(chemistry) An acid, C₁₀H₁₈O₂, obtained from camphor.

(chemistry) An acid, C₁₀H₁₆O₄, obtained from camphor.

(chemistry) An acid, C₉H₁₂O₅, obtained from camphor.

(chemistry) persulphocyanic acid

(chemistry, obsolete) A supposed nitrogenous acid obtained by the action of acetic acid and potassium nitrite on uric acid, later found to be a mixture of allantoin with oxaluric acid and oxalic acid.

(chemistry) A yellow crystalline substance, analogous to sulphocyanic acid, but containing more sulphur.

(organic chemistry, obsolete) An acid of the oleic acid series, said to occur in mustard oil.