an oxidized electron donor

a reduced electron donor

a deaminated amino group acceptor

an aminated amino group acceptor

Charged-LEU-tRNAs

LEU-tRNAs

a 2-oxo acid

an amino acid

an acyl-CoA

a carboxylate

an oxidized ferredoxin [iron-sulfur] cluster

a reduced ferredoxin [iron-sulfur] cluster

NAD(P)H

NAD(P)+

an L-tyrosyl-[tRNAtyr]

a tRNAtyr

(2Z,4Z)-2-hydroxy-5-carboxymuconate-6-semialdehyde

4α,14α-dimethyl-porifersta-8,25(27)-dienol

2-amino-4,5-dihydroxy-6-oxo-7-(phosphooxy)heptanoate

4-methylcyclohex-1,5-diene-1-carbonyl-CoA

isoshowacene

2-hydroxyhexadecanal

16-sinapoyloxypalmitate

3-methylquinolin-2-ol

(22R)-hydroxycholesterol

N-(2-methylpropyl)hydroxylamine

chloroeremomycin

3-hydroxy-3-methylbutanoate

2',3',4'-O-methyl-rhamnosyl tetracyclic spinosyn pseudoaglycone

2',3'-O-methyl-rhamnosyl tetracyclic spinosyn pseudoaglycone

2'-O-methyl-rhamnosyl tetracyclic spinosyn pseudoaglycone

rhamnosyl tetracyclic spinosyn pseudoaglycone

rhamnosyl tricyclic spinosyn pseudoaglycone

spinosyn tricyclic macrolactone

11-dehydro-15-oxo spinosyn macrolactone

15-oxo spinosyn macrolactone

spinosyn macrolactone

diethylamine N-oxide

triethylamine N-oxide

UDP-2-acetamido-2-deoxy-α-D-ribo-hex-3-uluronate

nitroxyl

trans,octacis-decaprenylphospho-β-D-arabinofuranose

1,3-dihydro-2H-imidazol-2-one

2-phenylethyl β-D-glucopyranoside

formyl hopane

ribosyl hopane

adenosyl hopane

(2Z)-2-hydroxypenta-2,4-dienoate

(2S,4S)-4-hydroxy-2,3,4,5-tetrahydrodipicolinate

(2Z)-2,4-dihydroxypent-2-enoate

(2E,7Z,10Z,13Z,16Z,19Z)-docosahexaenoyl-CoA

(3R,5Z,8Z,11Z,14Z,17Z)-3-hydroxydocosapentaenoyl-CoA

(5Z,8Z,11Z,14Z,17Z)-3-oxodocosapentaenoyl-CoA

(+)-3'-hydroxylarreatricin

(+)-larreatricin

2-trans,4-trans-xanthoxin

bisorganyltrisulfane

ammonia

enol-phenylpyruvate

S-(hydroxymethyl)mycothiol

1,2-dihydro-β-NADP

mycothione

mercuriphenyl acetate

3-dehydroshikimate

(S)-dihydroorotate

glutathione disulfide

L-histidinol phosphate

propanoyl phosphate

1-O-(2-acetamido-2-deoxy-α-D-glucopyranosyl)-1D-myo-inositol 3-phosphate

1-(2-acetamido-2-deoxy-α-D-glucopyranosyl)-1D-myo-inositol

N-Formyl-L-kynurenine

(R)-4'-phosphopantothenate

2-dehydropantoate

(R)-5-phosphomevalonate

hydroxyatrazine

ethylamine

3-dehydroquinate

(S)-2,3,4,5-tetrahydrodipicolinate

N-succinyl-2-amino-6-ketopimelate

2-iminoacetate

hydroxypyruvate

diethylthiophosphate

diethylphosphate

dimethylthiophosphate

2-pyrone-4,6-dicarboxylate

4-fumaryl-acetoacetate

selenophosphate

chlorite

coproporphyrinogen III

3-deoxy-D-arabino-heptulosonate 7-phosphate

N-isopropylammelide

isopropylamine

(R)-mevalonate

(R)-pantothenate

31-O-desmethylFK-506

FK-506

3-hydroxyanthranilate

ethanolamine

isochorismate

(1R,6R)-6-hydroxy-2-succinylcyclohexa-2,4-diene-1-carboxylate

2-succinylbenzoate

porphobilinogen

(3R,5S)-3-hydroxy-1-pyrroline-5-carboxylate

(2-carboxy-2,5-dihydro-5-oxofuran-2-yl)-acetate

L-canavanine

N-acetylglutamyl-phosphate

D-erythro-imidazole-glycerol-phosphate

imidazole acetol-phosphate

acetoacetate

(E)-4-hydroxy-3-methylbut-2-en-1-yl diphosphate

citraconate

(2R,3S)-3-methylmalate

(2Z,4Z)-2-hydroxyhepta-2,4-dienedioate

(4Z)-2-oxohept-4-enedioate

O-acetyl-L-serine

3-ureidopropanoate

2-deoxygluconate

3-dehydro-2-deoxy-D-gluconate

3-[(3aS,4S,7aS)-7a-methyl-1,5-dioxo-octahydro-1H-inden-4-yl]propanoate

3-[(3aS,4S,7aS)-7a-methyl-1,5-dioxo-octahydro-1H-inden-4-yl]propanoyl-CoA

(4,5-dihydro-5-oxofuran-2-yl)-acetate

4-methyl-3-oxoadipate-enol-lactone

4-methyl-3-oxoadipate

4-prenylphlorisobutyrophenone

3-(O-geranylgeranyl)-sn-glycerol 1-phosphate

L-tartrate

meso-tartrate

2-hydroxy-3-oxosuccinate

4-guanidinobutanoate

urea

2-(α-hydroxyethyl)thiamine diphosphate

thiamine diphosphate

(R)-mevalonate diphosphate

prenyl diphosphate

poly (glycerol phosphate)

CDP-glycerol

2-C-methyl-D-erythritol-2,4-cyclodiphosphate

5-amino-1-(5-phospho-β-D-ribosyl)imidazole

N²-formyl-N¹-(5-phospho-β-D-ribosyl)glycinamide

2-(formamido)-N¹-(5-phospho-β-D-ribosyl)acetamidine

5-phospho-β-D-ribosylamine

N¹-(5-phospho-β-D-ribosyl)glycinamide

orotidine 5'-phosphate

glycolate

hydrogen peroxide

L-selenocystathionine

anthranilate

1-(2-amino-2-deoxy-α-D-glucopyranosyl)-1D-myo-inositol

4-amino-2-methyl-5-(phosphooxymethyl)pyrimidine

4-amino-2-methyl-5-(diphosphooxymethyl)pyrimidine

glycerone phosphate

DNA without lesion

carbamoyl phosphate

carboxyphosphate

shikimate

shikimate 3-phosphate

5-enolpyruvoyl-shikimate 3-phosphate

4-hydroxy-2-nonenal

carbonic acid

β-nicotinate D-ribonucleotide

nicotinate adenine dinucleotide

mycothiol-arsenate conjugate

N-succinyl-L,L-2,6-diaminopimelate

oxalosuccinate

isopentenyl diphosphate

5'-phosphoribosyl-4-(N-succinocarboxamide)-5-aminoimidazole

4-(2'-carboxyphenyl)-4-oxobutyryl-CoA

1,4-dihydroxy-2-naphthoyl-CoA

(S)-4-amino-5-oxopentanoate

5-aminolevulinate

citrate

α-D-glucosamine 1-phosphate

L-arginino-succinate

O-ureido-L-homoserine

canavaninosuccinate

N-acetyl-L-glutamate 5-semialdehyde

N-(5-phosphoribosyl)-anthranilate

(2S)-2-isopropylmalate

2-isopropylmaleate

(2R,3S)-3-isopropylmalate

(2S)-2-isopropyl-3-oxosuccinate

4-methyl-2-oxopentanoate

3-ethylmalate

2-oxovalerate

(S)-2-aceto-2-hydroxybutanoate

(S)-2-acetolactate

(R)-2,3-dihydroxy-3-methylpentanoate

(S)-3-methyl-2-oxopentanoate

3-methyl-2-oxobutanoate

histidinal

histidinol

oxaloacetate

3-oxopropanoate

4-aminobutanoate

2,3-didehydroadipyl-CoA

3S-(4-hydroxyphenyl)-3-hydroxy-propanoyl-CoA

(E)-4-coumaroyl-CoA

phosphoenolpyruvate

4-phosphooxy-L-threonine

(2S)-2-amino-3-oxo-4-phosphooxybutanoate

3-amino-1-hydroxyacetone 1-phosphate

H₂O

succinate semialdehyde

CO₂

4-methylphenol

L-homocysteine

dTDP-4-dehydro-6-deoxy-α-D-glucopyranose

sn-glycerol 3-phosphate

sn-glycerol 1-phosphate

DNA with lesion

phenylacetate

ethylphosphate

uroporphyrinogen-III

uroporphyrinogen-I

coproporphyrinogen I

oxygen

Hg⁰

hydrogen sulfide

2-chloroacetate

3-phospho-D-glyceroyl-phosphate

2-phospho-D-glycerate

3-phospho-D-glycerate

(2R)-2,3-dihydroxy-3-methylbutanoate

S-(4-hydroxy-nonenal-3-yl)-L-cysteinylglycine

CMP-N-acetyl-β-neuraminate

(R)-citramalate

(R)-methylmalonate-semialdehyde

(S)-methylmalonate-semialdehyde

(S)-2-hydroxyglutarate

hydrogen cyanide

parathion

paraoxon

4-nitrophenol

1-chloro-2,4-dinitrobenzene

2,4-dinitrophenyl-S-glutathione

N-acetyl-β-neuraminate

5-chloro-5-deoxy-D-ribonate

5-chloro-4-hydroxy-2-oxopentanoate

Fe³⁺

ammonium

H⁺

Fe²⁺

Hg²⁺

Co²⁺

Zn²⁺

hydrogensulfite

OH^-

molybdate

selenide

thiosulfate

sulfite

superoxide

hydrogencarbonate

arsenate

phosphonate

phosphate

triphosphate

diphosphate

chloride

hydroxyl radical

(2E,6E)-farnesyl diphosphate

pristanate

sn-glycero-3-phosphoethanolamine

glycerophosphoglycerol

glycerophosphoserine

glycine betaine

betaine aldehyde

2-iminopropanoate

2-aminoprop-2-enoate

(2Z)-2-aminobut-2-enoate

S-(hydroxymethyl)glutathione

thiocyanate

deacetylmycothiol

glutathione

mycothiol

methanethiol

S-sulfanylglutathione

5-(2-hydroxyethyl)-4-methylthiazole

4-methyl-5-(2-phosphooxyethyl)thiazole

L-cysteate

3-sulfopyruvate

VAI-1

AAI-1

PAI-1-2

PAI-1

VAI-1-2

HAI-1

2-methylbutanoyl-CoA

isobutanoyl-CoA

(S)-3-hydroxy-3-methylglutaryl-CoA

succinyl-CoA

malonyl-CoA

linoleoyl-CoA

α-linolenoyl-CoA

3-oxo-2-(cis-2'-pentenyl)-cyclopentane-1-(3R-hydroxybutanoyl)-CoA

3-oxo-2-(cis-2'-pentenyl)-cyclopentane-1-(E-buta-2-enoyl)-CoA

(3S)-hydroxyadipyl-CoA

(2S,3S)-3-hydroxy-2-methylbutanoyl-CoA

3-oxo-2-(cis-2'-pentenyl)-cyclopentane-1-(3R-hydroxyoctanoyl)-CoA

3-oxo-2-(cis-2'-pentenyl)-cyclopentane-1-(E-octa-2-enoyl)-CoA

3-hydroxyisovaleryl-CoA

(E)-2-methylcrotonoyl-CoA

3-oxo-2-(cis-2'-pentenyl)-cyclopentane-1-(3R-hydroxyhexanoyl)-CoA

3-oxo-2-(cis-2'-pentenyl)-cyclopentane-1-(E-hexa-2-enoyl)-CoA

methylacrylyl-CoA

2-methylacetoacetyl-CoA

acetyl-CoA

(S)-methylmalonyl-CoA

crotonyl-CoA

phytenoyl-CoA

(2E,6Z,9Z,12Z,15Z,18Z,21Z)-tetracosaheptaenoyl-CoA

(2E,6Z,9Z,12Z,15Z,18Z)-tetracosahexaenoyl-CoA

(2E)-dec-2-enoyl-CoA

(2E)-oct-2-enoyl-CoA

ω-carboxy-(9Z)-octadec-9-enoyl-CoA

oleoyl-CoA

7-hydroxylauroyl-CoA

18-hydroxystearoyl-CoA

16-hydroxypalmitoyl-CoA

18-hydroxyoleoyl-CoA

(S)-3-hydroxybutanoyl-CoA

(3S,6Z,9Z,12Z,15Z,18Z,21Z)-3-hydroxytetracosahexaenoyl-CoA

(3S,6Z,9Z,12Z,15Z,18Z)-3-hydroxytetracosapentaenoyl-CoA

(S)-3-hydroxydecanoyl-CoA

(S)-3-hydroxyoctanoyl-CoA

(Z)-15-tetracosenoyl-CoA

propanoyl-CoA

decanoyl-CoA

lauroyl-CoA

octanoyl-CoA

stearoyl-CoA

palmitoyl-CoA

pristanoyl-CoA

3-oxoadipyl-CoA

4-methyl-3-oxoadipyl-CoA

acetoacetyl-CoA

3-oxopentanoyl-CoA

(S)-3-hydroxy-isobutanoyl-CoA

(25S)-3-oxocholest-4-en-26-oate

(25S)-3-oxocholest-4-en-26-oyl-CoA

7,8-dihydrofolate monoglutamate

pyridoxamine 5'-phosphate

pyridoxine 5'-phosphate

pyridoxal 5'-phosphate

FAD

FADH₂

FMNH₂

FMN

(R)-NADHX

(S)-NADHX

NADPH

NADH

NADP⁺

NAD⁺

caldariellaquinone

caldariellaquinol

isoguanine

8-oxo-dGTP

8-oxo-GTP

hypoxanthine

cyclic-AMP

5'-deoxyadenosine

pppGpp

ppGpp

2'-deoxyguanosine

dIDP

dITP

ITP

IDP

GMP

XMP

IMP

adenylo-succinate

dATP

dADP

dGTP

dGDP

ADP

GTP

GDP

1-(5-phospho-β-D-ribosyl)-ATP

1-(5-phospho-β-D-ribosyl)-AMP

ATP

AMP

P¹,P⁴-bis(5'-adenosyl) tetraphosphate

guanosine

cytidine

uridine

2'-deoxycytidine

2'-deoxyuridine

thymidine

2-hydroxy-dATP

5-hydroxy-CTP

dTTP

dCTP

dUTP

CTP

UTP

dTMP

dUMP

CMP

UMP

dTDP

dUDP

dCDP

UDP

CDP

2-sulfanyl-N⁶-dimethylallyladenosine³⁷ in tRNA

2-methylsulfanyl-N⁶-dimethylallyladenosine³⁷ in tRNA

ADP-α-D-glucose

N¹-ethyladenine

N3-methylcytosine

N¹-methyladenine

thymine

cytosine

uracil

guanine

adenine

5,6-dihydrouracil

5,6-dihydrothymine

UDP-α-D-glucose

dTDP-α-D-glucose

UDP-N-acetyl-α-D-glucosamine-enolpyruvate

UDP-N-acetyl-α-D-muramoyl-L-alanyl-γ-D-glutamyl-L-lysyl-D-alanine

UDP-N-acetyl-α-D-muramoyl-L-alanyl-γ-D-glutamyl-L-lysyl-D-alanyl-D-alanine

UDP-N-acetyl-α-D-muramoyl-L-alanyl-γ-D-glutamyl-meso-2,6-diaminopimeloyl-D-alanyl-D-alanine

UDP-N-acetyl-α-D-glucosamine

2-phospho-4-(cytidine 5'-diphospho)-2-C-methyl-D-erythritol

molybdopterin

coenzyme A

MoO₂-molybdopterin cofactor

(S)-1-pyrroline-5-carboxylate

hydantoin

(7,8-dihydropterin-6-yl)methyl diphosphate

molybdopterin adenine dinucleotide

cyclic pyranopterin phosphate

7,8-dihydroneopterin 3'-triphosphate

7,8-dihydropteroate

orotate

benzene

actinorhodin intermediate

actinorhodin

cyanuric acid

atrazine

amino-parathion

methyl parathion

indole

(1S,2R)-1-C-(indol-3-yl)glycerol 3-phosphate

4-aminophenol

protocatechuate

8'-(3,4-dihydroxy-5-alkenyl)phenyl-3-[9'E,11'E,13'Z-pentadecatrienyl]catechol

enterobactin

dimeric urushiol peroxide

3-[(8Z,11E,13Z)-pentadeca-8,11,13-trien-1-yl] )catechol

6-methoxy-3-methyl-2-all-trans-decaprenyl-1,4-benzoquinol

all trans-decaprenyl-2-methoxy-6-1,4-benzoquinol

4-aminobenzoate

diacetyl

methylglyoxal

1-octanal

1-propanal

formaldehyde

acetaldehyde

D-glyceraldehyde

aldehydo-D-ribose

α-D-ribofuranose

β-D-ribofuranose

α-L-arabinopyranose

propan-1-ol

methanol

ethanol

1-octanol

glycerol

myo-inositol

1D-myo-inositol 4-monophosphate

1D-myo-inositol 1-monophosphate

1D-myo-inositol 2-monophosphate

1D-myo-inositol 6-monophosphate

1D-myo-inositol 5-monophosphate

1D-myo-inositol 3-monophosphate

(S)-propane-1,2-diol

maltotriose

maltotetraose

maltopentaose

maltoheptaose

maltohexaose

α,α-trehalose

N-acetyl-α-D-glucosamine 1-phosphate

N-acetyl-α-D-mannosamine

decaprenyl-diphospho-N-acetylmuramoyl-pentapeptide

undecaprenyl-diphospho-N-acetylmuramoyl-L-alanyl-γ-D-glutamyl-L-lysyl- D-alanine

decaprenyl-pyrophosphoryl-(N-acetylglucosamine)-N-acetylmuramyl-(pentapeptide)

a peptidoglycan dimer (mycobacteria)

a peptidoglycan dimer (S. aureus)

a peptidoglycan dimer (E. faeciums)

a peptidoglycan dimer (E. faecium, tetrapeptide)

ditrans,octacis-undecaprenyldiphospho-N-acetyl-(N-acetylglucosaminyl)muramoyl-L-alanyl-γ-D-isoglutaminyl-L-lysyl-(glycyl)₅-D-alanyl-D-alanine

ditrans,octacis-undecaprenyldiphospho-N-acetyl-(N-acetylglucosaminyl)muramoyl-L-alanyl-γ-D-isoglutaminyl-N-(β-D-asparaginyl)-L-lysyl-D-alanyl-D-alanine

ditrans,octacis-undecaprenyldiphospho-N-acetyl-(N-acetylglucosaminyl)muramoyl-L-alanyl-γ-D-isoglutaminyl-N-(β-D-asparaginyl)-L-lysyl-D-alanine

undecaprenyl-diphospho-N-acetylmuramoyl-L-alanyl-γ-D-glutamyl-L-lysyl- D-alanyl-D-alanine

undecaprenyldiphospho-N-acetylmuramoyl-L-alanyl-γ-D-glutamyl-meso-2,6-diaminopimeloyl-D-alanyl-D-alanine

α,α-trehalose 6-phosphate

α-D-glucopyranose 1-phosphate

D-glyceraldehyde 3-phosphate

5-phospho-α-D-ribose 1-diphosphate

1-(o-carboxyphenylamino)-1'-deoxyribulose 5'-phosphate

D-sedoheptulose 7-phosphate

D-erythrose 4-phosphate

β-D-fructose 1,6-bisphosphate

D-fructose 6-phosphate

β-D-fructofuranose 6-phosphate

β-D-glucose 6-phosphate

1-deoxy-D-xylulose 5-phosphate

D-xylulose 5-phosphate

D-ribulose 5-phosphate

α-D-ribose-1-phosphate

β-D-glucopyranose 1-phosphate

β-D-fructofuranose 1-phosphate

18-hydroxystearate

16-hydroxypalmitate

18-hydroxyoleate

geranyl diphosphate

trans,octacis-decaprenyl phosphate

mono-trans,octa-cis-decaprenyl diphosphate

di-trans,octa-cis-undecaprenyl phosphate

geranylgeranyl diphosphate

di-trans,octa-cis-undecaprenyl diphosphate

5-deoxy-dihydrokalafungin

(S)-DNPA

2-((1R,3S),-1',9'-dihydroxy-1'-methyl-10'-oxo-3',4',5',10'-tetrahydro-1H-benzo[g]isochromen-3'-yl)acetate

phlorisovalerophenone

4-(3'-acetyl-5'-hydroxy-4'-oxo-1',4'-dihydronapthalen-2'-yl)-3-oxobutanoate

(S)-4-(3'-acetyl-5'-hydroxy-4'-oxo-1',4'-dihydronapthalen-2'-yl)-3-hydroxybutanoate

deoxyhumulone

deoxycohumulone

4-prenylphlorisovalerophenone

dihydrokalafungin

6-aminopenicillanate

isopenicillin N

penicillin G

3-benzyl-3,6-dihydroxy-6-(hydroxymethyl)-diketopiperazine

3-benzyl-3,6 -bis(glutathione)- 6-(hydroxymethyl)-diketopiperazine

5-formamido-1-(5-phospho-D-ribosyl)-imidazole-4-carboxamide

5-amino-1-(5-phospho-D-ribosyl)imidazole-4-carboxamide

1-(5-phospho-β-D-ribosyl)-5-[(5-phosphoribosylamino)methylideneamino]imidazole-4-carboxamide

phosphoribulosylformimino-AICAR-phosphate

chorismate

succinate

fumarate

L-aspartate

(S)-malate

α,ω-9Z-octadecenedioate

3-(carbamoylamino)-2-methylpropanoate

(1E,3E)-4-hydroxybuta-1,3-diene-1,2,4-tricarboxylate

3-carboxy-cis,cis-muconate

(1E)-4-oxobut-1-ene-1,2,4-tricarboxylate

cis-aconitate

(2R,3S)-2-methylisocitrate

D-threo-isocitrate

3-oxoadipate

3-phenyl-2-oxopropanoate

pyruvate

glyoxylate

2-oxobutanoate

2-oxoglutarate

acetate

formate

propanoate

(R)-lactate

decanoate

7-hydroxylaurate

laurate

octanoate

(R)-3-hydroxybutanoate

(15Z)-tetracosenoate

(9Z,15Z)-12,13-epoxy-octadeca-9,15-dienoate

(12Z,15Z)-9,10-epoxyoctadeca-12,15-dienoate

(9Z,12Z)-15,16-epoxyoctadeca-9,12-dienoate

(9Z,15Z)-12,13-dihydroxyoctadeca-9,15-dienoate

(12Z,15Z)-9,10-dihydroxyoctadeca-12,15-dienoate

(9Z,12Z)-15,16-dihydroxyoctadeca-9,12-dienoate

linoleate

α-linolenate

stearate

palmitate

oleate

phytenate

(R)-pantoate

L-α-amino-ε-keto-pimelate

L-2-aminoadipate

L-kynurenine

carbamate

D-serine

L-serine

L-cysteine

L-tyrosine

glycine

L-glutamine

L-threonine

L-lysine

L-arginine

L-histidine

L-glutamate

L-methionine

L-phenylalanine

L-proline

L-leucine

L-alanine

L-tryptophan

L-isoleucine

L-valine

β-alanine

(R)-3-amino-2-methylpropanoate

(S)-3-amino-2-methylpropanoate

D-glutamate

D-alanine

L-ornithine

L-aspartyl-4-phosphate

L-cystathionine

L,L-diaminopimelate

L-2,4-diaminobutanoate

N-carbamoyl-L-aspartate

N-(3-oxohexanoyl)-L-homoserine

N-(3-oxooctanoyl)-L-homoserine

N-(butyryl)-L-homoserine

N-(3-oxododecanoyl)-L-homoserine

N-(octanoyl)-L-homoserine

N-(3-hydroxybutanoyl)-L-homoserine

N-acetyl-L-ornithine

seleno-L-homocysteine

N-carbamoylglycine

N-acetyl-L-glutamate

N-acetyl-L-methionine

3-hydroxy-L-kynurenine

trans-4-hydroxy-L-proline

O-acetyl-L-homoserine

L-citrulline

L-glutamate-5-semialdehyde

L-homoserine

L-canaline

S-adenosyl-L-homocysteine

S-adenosyl-L-methionine

1-aminocyclopropane-1-carboxylate

L-aspartate 4-semialdehyde

O-phospho-L-homoserine

meso-diaminopimelate

S-(4-hydroxy-nonenal-3-yl)-L-cysteine

(glutathion-S-yl)-4-hydroxy-2-nonenal

(S)-3-hydroxy-isobutanoate

2-iminobutanoate