As a resorcylic acid, it is one of the three isomeric crystalline acids that are both carboxyl derivatives of resorcinol and dihydroxy derivatives of benzoic acid.

[4] Synthesis from resorcinol is via the Kolbe-Schmitt reaction.

[5] It is a degradation product of cyanidin glycosides from tart cherries in cell cultures.

[6] It is also a metabolite found in human plasma after cranberry juice consumption.

This article about an aromatic compound is a stub.