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(2E)-3-methylhex-2-enoic acid 
(2S)-2-[(\{4-[2-(2-amino-4-oxo-4,7-dihydro-3H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl]phenyl\}carbonyl)amino]-4-(2H-tetrazol-5-yl)butanoic acid 
(2S)-3-methyl-2-((2R,3S)-3-[(methylsulfonyl)amino]-1-\{[2-(pyrrolidin-1-ylmethyl)-1,3-oxazol-4-yl]carbonyl\}pyrrolidin-2-yl)butanoic acid 
(2S,3R)-2-[(3S,6R)-3-amino-6-hydroxy-2-oxopiperidinyl]-3-hydroxybutanoic acid 
(3E)-3-[(1R,5R,6S)-5-hydroxy-7-oxabicyclo[4.1.0]heptan-2-ylidene]pyruvic acid 
(3E)-4-(2-hydroxyphenyl)-2-oxobut-3-enoic acid 
(3E)-4-(5-amino-2-hydroxyphenyl)-2-oxobut-3-enoic acid 
(3S)-3-methyl-2-oxo-3-phenylpropanoic acid 
(4-bromophenylsulfanyl)pyruvic acid 
(4R)-4-hydroxypentanoic acid +  
(R)-2-hydroxy-4-(hydroxymethylphosphinyl)butyric acid 
(R)-3,4-dihydroxy-2-oxobutanoic acid 
(R)-3-[(R)-3-hydroxybutanoyloxy]butanoic acid 
(R)-3-hydroxy-2-oxo-4-phosphonooxybutanoic acid 
(S)-2,4-dihydroxy-3-oxobutanoic acid 
(S)-2-acetyl-2-hydroxybutanoic acid 
(S)-3,4-dihydroxy-2-oxobutanoic acid 
(S)-3-hydroxy-2-oxo-3-phenylpropanoic acid 
1,2-dibutyryl-sn-glycero-3-phospho-(1'D-myo-inositol) 
1,2-dibutyryl-sn-glycero-3-phospho-(1'D-myo-inositol-5'-phosphate) 
1-butyryl-2-oleoyl-sn-glycerol 
1-palmitoyl-2-butanoyl-sn-glycero-3-phosphocholine 
2,2,4-trihydroxybutanoic acid 
2,3-dihydroxy-3-methylbutanoic acid +  
2,4-diaminobutyric acid +   
2-(hydroxymethyl)-4-oxobutanoic acid 
2-acetyllactic acid +  
2-amino-2-hydroxybutanoic acid 
2-amino-2-methylbutanoic acid 
2-amino-3-oxobutanoic acid +  
2-aminophenylglyoxylic acid 
2-dehydro-3-deoxy-D-arabinonic acid 
2-dehydro-3-deoxy-L-arabinonic acid 
2-ethylhydracrylic acid 
2-hexenoic acid +  
2-hydroxy-3-methylbenzylidenepyruvic acid 
2-hydroxy-3-methylpentanoate +  
2-hydroxy-3-methylpentanoic acid +  
2-hydroxy-4-hydroxymethylbenzylidenepyruvic acid 
2-hydroxybutyric acid +  
2-methylacetoacetic acid +  
2-methylbut-2-enoic acid +  
2-methylvaleric acid 
2-oxo-3-(5-oxofuran-2-ylidene)propanoic acid 
2-oxo-3-[4-(sulfooxy)phenyl]propanoic acid 
2-oxobut-3-enoic acid 
2-oxobutanoic acid +   
A 2-oxo monocarboxylic acid that is the 2-oxo derivative of butanoic acid.
2-oxodecanoic acid 
2-oxododecanoic acid 
2-oxoglutaramic acid +  
2-oxohex-4-enoic acid +  
2-oxohexanoic acid 
2-oxononanoic acid 
2-oxooctadecanoic acid 
2-oxooctanoic acid 
2-oxopent-4-enoic acid 
2-oxopenta-3,4-dienoic acid 
2-oxopentanoic acid 
2-oxophytanic acid 
2-phenylbutyric acid 
3,4-dihydro-4-hydroxyphenylpyruvic acid +  
3,4-dihydroxybutyric acid 
3,4-dihydroxyphenylpyruvic acid 
3,5-dibromo-4-hydroxyphenylpyruvic acid 
3,5-dihydroxyphenylglyoxylic acid 
3,5-dinitro-4-hydroxyphenylpyruvic acid 
3-(3-methoxy-4-phenylmethoxyphenyl)-2-oxopropanoic acid 
3-(4-aminophenyl)pyruvic acid 
3-(4-hydroxycyclohex-2-en-1-ylidene)pyruvic acid +  
3-(imidazol-4-yl)pyruvic acid 
3-(indol-3-yl)-2-oxobutyric acid +  
3-(indol-3-yl)pyruvic acid 
3-[(1R,2S,5R,6S)-5-hydroxy-7-oxabicyclo[4.1.0]heptan-2-yl]pyruvic acid 
3-[3-methoxy-4-(sulfooxy)phenyl]-2-oxopropanoic acid 
3-[4-hydroxy-3-(sulfooxy)phenyl]-2-oxopropanoic acid 
3-aminobutanoic acid +  
3-bromopyruvic acid  
3-dimethylallyl-4-hydroxyphenylpyruvic acid 
3-fluoropyruvic acid 
3-hydroxy-2-methylbutanoic acid +  
3-hydroxy-3-methyl-2-oxobutanoic acid 
3-hydroxy-3-methyl-2-oxopentanoic acid +  
3-hydroxybutyric acid +   
3-hydroxyisovaleric acid +   
3-hydroxypentanoic acid +  
3-hydroxyphenylpyruvic acid 
3-hydroxypyruvic acid  
3-mercaptopyruvic acid 
3-methyl-2-oxobutanoic acid  
3-methyl-2-oxovaleric acid +   
3-methylbut-2-enoic acid +  
3-methylvaleric acid 
3-phosphonopyruvic acid 
3-sulfinylpyruvic acid 
4-(2-amino-5-hydroxyphenyl)-2,4-dioxobutanoic acid 
4-(2-aminophenyl)-2,4-dioxobutanoic acid 
4-(2-thienyl)butyric acid 
4-(3-hydroxy-1-benzothiophen-2-yl)-2-oxobut-3-enoic acid +  
4-(5-ethyl-2-thienyl)-4-oxobutyric acid 
4-(hydroxymethylphosphinyl)-2-oxobutyric acid 
4-(methylamino)butyric acid 
4-[3-(3-nitrophenyl)-1,2,4-oxadiazol-5-yl]butanoic acid 
4-[4-(2,5-dioxopyrrolidin-1-yl)phenylamino]-4-hydroxybutyric acid 
4-[4-(3,5-dioxohexyl)phenylcarbamoyl]butyric acid 
4-amino-4-deoxyprephenic acid 
4-guanidinobutanoic acid 
4-hydroxy-2-oxohexanoic acid +  
4-hydroxy-2-oxopentanoic acid +  
4-hydroxybutyric acid +   
4-hydroxyphenylpyruvic acid +  
4-methyl-2-oxopentanoic acid  
4-methylpent-3-enoic acid 
4-methylthio-2-oxobutanoic acid +   
4-oxo-4-(2-thienyl)butyric acid 
4-oxo-4-phenylbutyric acid 
4-phenylbutyric acid  
5-amino-2-oxopentanoic acid 
5-chloro-4-hydroxy-2-oxopentanoic acid 
5-guanidino-2-oxopentanoic acid 
5-guanidino-3-methyl-2-oxopentanoic acid 
6-acetamido-2-oxohexanoic acid 
6-amino-2-oxohexanoic acid +  
6-hydroxy-2-oxohexanoic acid 
aceneuramic acid  
acetoacetic acid +   
alpha-amino-gamma-cyanobutanoic acid 
alpha-aminobutyric acid +  
beta-(methylenecyclopropyl)pyruvic acid 
butenoic acid +   
butyrate ester +   
butyryl group 
butyryl-CoA +   
butyrylglycine 
cis-4-(1-hydroxy-2-naphthyl)-2-oxobut-3-enoic acid 
D-2,4-diaminobutyric acid 
dibutyrin +   
Dimethoxycinnamic acid 
dimethylbutyric acid +  
discadenine 
fatty acid 4:0 +   
gamma-amino-beta-hydroxybutyric acid +  
gamma-amino-gamma-cyanobutanoic acid +  
gamma-aminobutyric acid +   
glyoxylic acid +   
heptafluorobutyric anhydride 
hexyl butyrate 
hydroxybutyric acid +   
Hydroxyphenylpyruvic acid 
indole-3-butyric acid +   
isooctanediol dibutyrate 
isovaleric acid +   
keto-phenylpyruvic acid +   
L-2,4-diaminobutyric acid +  
L-2-amino-4-(hydroxymethylphosphinoyl)butanoic acid 
lignin cw compound-2040 
lignin cw compound-2041 
lignin cw compound-2042 
lignin cw compound-3052 
lignin cw compound-3056 
Loniphenyruviridoside B, (rel)- 
Loniphenyruviridoside C 
methionine +   
Methyl 3-(4-methoxyphenyl)-2-oxopropanoate 
methylbutyric acid +   
monobutyrin 
N-(butanoyl)ethanolamine 
N-butanoylserotonin 
N-butyryl-1-palmitoyl-2-linoleoyl-sn-glycero-3-phosphoethanolamine 
N-methyl-2-oxoglutaramic acid 
O-butanoylcarnitine +   
omega-(methylthio)-2-oxocarboxylic acid +   
oxaluric acid 
pentadienoic acid +   
pentenoic acid +   
perfluorobutyric acid  
perquinoline A 
perquinoline C 
phenylglyoxylic acid +   
pivalic acid +   
propionic acid +   
propynoic acid +  
pyruvic acid +   
S-butyryl-4'-phosphopantetheine 
Schizotenuin F 
tetrahydro-4-hydroxyphenylpyruvic acid +  
tributyrin  
valeric acid +   
Vanillactic acid 
Vanilpyruvic acid 

Synonyms
Related Synonyms: 2-KETOBUTYRIC ACID ;   2-Ketobutanoic acid ;   2-Oxobutyric acid ;   3-methyl pyruvic acid ;   Formula=C4H6O3 ;   InChI=1S/C4H6O3/c1-2-3(5)4(6)7/h2H2,1H3,(H,6,7) ;   InChIKey=TYEYBOSBBBHJIV-UHFFFAOYSA-N ;   SMILES=CCC(=O)C(O)=O ;   alpha-Ketobutyrate ;   alpha-ketobutyric acid ;   alpha-oxo-n-butyric acid
Alternate IDs: CHEBI:1250 ;   CHEBI:19743 ;   CHEBI:39748
Xrefs: Beilstein:1700514 ;   CAS:600-18-0 ;   DrugBank:DB04553 ;   Gmelin:601216 ;   HMDB:HMDB0000005 ;   KEGG:C00109 ;   KNApSAcK:C00019675 ;   LIPID_MAPS_instance:LMFA01060002
Xref Mesh: MESH:C005087
Xrefs: MetaCyc:2-OXOBUTANOATE ;   PDBeChem:2KT ;   Reaxys:1700514 ;   Wikipedia:Alpha-Ketobutyric_acid
Cyclic Relationships: is_conjugate_acid_of CHEBI:16763

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