Trihydroxybenzoic acid

Trihydroxybenzoic acid may refer to the following phenolic acids:

• Gallic acid (3,4,5-trihydroxybenzoic acid)
• Phloroglucinol carboxylic acid (2,4,6-trihydroxybenzoic acid)

O-methylated trihydroxybenzoic acids are:

• Eudesmic acid
• Syringic acid

Glycosides:

• Theogallin