(chemistry) A superacid, FSO₃H-SbF₅, consisting of a mixture of fluorosulfonic acid and antimony pentafluoride, capable of protonating even weak bases.

(organic chemistry) An unsaturated fatty acid containing twenty-four carbon atoms

(pharmacology) A molecule used as a contrast medium.

(organic chemistry) Any of several polyphenolic acids derived from caffeic acid

(organic chemistry) A heterocyclic organic acid with a pyran skeleton.

(biochemistry) The natural, active form of folic acid used at the cellular level for DNA reproduction, the cysteine cycle, the regulation of homocysteine, etc.

(organic chemistry) A weak organic acid with a phosphonic acid group, one of the primary degradation products of the herbicide glyphosate.

(organic chemistry) A constituent of some ellagitannins, comprising a hexahydroxydiphenic acid unit linked by an O-C bond to a gallic acid.

(organic chemistry) A natural phenol found in many fruits.

(organic chemistry) A component of some ellagitannins, such as casuarictin; it has the formula [(HO)₃C₆HCO₂H]₂.