Methylprotocatechuic acid, also known as 3-methyl-4-hydroxybenzoic acid, is a naturally occurring compound found in various plant sources. Synonyms for this organic acid include 3-methyl-4-hydroxybenzoate, ortho-methylprotocatechuic acid, and 3-methylprotocatecholic acid. These terms are often used interchangeably in scientific literature to refer to the same chemical compound. Methylprotocatechuic acid possesses antioxidant and anti-inflammatory properties and has shown potential in various medicinal applications. Understanding the various synonyms for this compound is vital for researchers and scientists to ensure accurate communication and referencing in studies related to its pharmacological properties and therapeutic uses.