Carboxylic acids

Monocarboxylic acid

Formic acid
Methanoic acid
C00058		 Acetic acid
Ethanoic acid
C00033		 Propionic acid
Propanoic acid
C00163		 Butyric acid
Butanoic acid
C00246
Valeric acid
Pentanoic acid
C00803		 Caproic acid
Hexanoic acid
C01585		 Enanthic acid
Heptanoic acid
C17714		 Caprylic acid
Octanoic acid
C06423
See Fatty acids for long-chain carboxylic acids

Dicarboxylic acid

Oxalic acid
C00209		 Malonic acid
C00383		 Succinic acid
C00042
Glutaric acid
C00489		 Adipic acid
C06104		 Pimelic acid
C02656		 Suberic acid
C08278

Tricarboxylic acid

Citrate
C00158		 Isocitrate
C00311		 cis-Aconitate
C00417		 trans-Aconitate
C02341

2-Oxocarboxylic acid (alpha-Keto acid)

2-Oxoacetate
Glyoxylate
C00048		 2-Oxopropanoate
Pyruvate
C00022		 2-Oxobutanoate
C00109		 2-Oxovalerate
C06255		 2-Oxohexanoate
C00902
2-Oxosuccinate
Oxaloacetate
C00036		 2-Oxoglutarate
C00026		 2-Oxoadipate
C00322		 2-Oxopimelate
C16588		 2-Oxosuberate
C16589
2-Oxoisovalerate
C00141		 2-Oxoisocaproate
C00233		 3-Methyl-2-oxopentanoate
C00671

3-Oxocarboxylic acid (beta-Keto acid)

3-Oxopropanoate
Malonate semialdehyde
C00222		 3-Oxobutanoate
Acetoacetate
C00164

4-Oxocarboxylic acid (gamma-keto acid)

4-Oxobutanoate
Succinate semialdehyde
C00232

Hydroxycarboxylic acid

(S)-2-Hydroxypropanoate
L-Lactate
C00186		 (S)-2-Hydroxybutanediate
Malate
C00149		 3-Hydroxypropanoate
C01013		 (R)-3-Hydroxybutanoate
C01089		 4-Hydroxybutanoate
C00989

Semialdehyde (monoaldehyde of dicarboxylic acid)

3-Oxopropanoate
Malonate semialdehyde
C00222		 4-Oxobutanoate
Succinate semialdehyde
C00232		 5-Oxopentanoate
Glutarate semialdehyde
C03273		 6-Oxohexanoate
Adipate semialdehyde
C06102		 7-Oxoheptanoate
C16590

Oxocarboxylic acid derivatives

2-Aminopropanoate
alpha-Alanine
C00041		 3-Aminopropanoate
beta-Alanine
C00099		 4-Aminobutanoate
GABA
C00334

CoA attached

Formyl-CoA
C00798		 Acetyl-CoA
C00024		 Propionyl-CoA
Propanoyl-CoA
C00100		 Butyryl-CoA
Butanoyl-CoA
C00136
Malonyl-CoA
C00083		 Succinyl-CoA
C00091