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2,4-diacetylphloroglucinol is a benzenetriol that is phloroglucinol in which two of the ring hydrogens are replaced by acetyl groups. It has a role as a bacterial metabolite and an antifungal agent. It is a diketone, an aromatic ketone, a methyl ketone and a benzenetriol. It is functionally related to a phloroglucinol. It is a conjugate acid of a 2,4-diacetylphloroglucinol(1-). 2,4-Diacetylphloroglucinol is a natural product found in Pseudomonas, Pseudomonas fluorescens, and Pseudomonas protegens with data available.

5-Hydroxyferulic acid (CAS: 1782-55-4), also known as 3-(3,4-dihydroxy-5-methoxy)-2-propenoic acid, belongs to the class of organic compounds known as hydroxycinnamic acids. Hydroxycinnamic acids are compounds containing a cinnamic acid where the benzene ring is hydroxylated. Outside of the human body, 5-hydroxyferulic acid has been detected, but not quantified in, several different foods, such as common salsifies, napa cabbages, sparkleberries, nectarines, and Chinese chestnuts. This could make 5-hydroxyferulic acid a potential biomarker for the consumption of these foods. 5-Hydroxyferulic acid is found in green vegetables. 5-Hydroxyferulic acid is isolated from bamboo (Phyllostachys edulis).

Vanilpyruvic acid is a catecholamine metabolite and precursor to vanilactic acid. Accumulation in urine is indicative of Aromatic L-aminoacid decarboxylase deficiency (PMID 16288991).

An organic anion derived from prohexadione by deprotonation of both the carboxy group and a hydroxy group of any of the enolate forms of the triketo moiety. The corresponding calcium salt, prohexadione-calcium, is used as an anti-lodging agent in small-grain cereals." []

A dicarboxylic acid monoester that resulting from the formal condensation of one of the carboxy groups of terephthalic acid with one of the hydroxy groups of ethylene glycol." []

(3S,4S)-4,5-dihydroxymellein is a hydroxybenzoic acid. (3S,4S)-4,5-dihydroxymellein has been reported in Paraphaeosphaeria sporulosa with data available.

2,4-dihydroxy-6-(2-oxopropyl)-benzoic acid is a hydroxybenzoic acid. 2,4-Dihydroxy-6-(2-oxopropyl)benzoic acid has been reported in Aspergillus flavus, Aspergillus oryzae, and other organisms with data available.

Botryoisocoumarin A is a hydroxybenzoic acid.

A 3-oxo monocarboxylic acid that is dihydroferulic acid in which the benzylic methylene group has been oxidised to give the corresponding ketone." []