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