Exact Mass: 263.92519500000003

Exact Mass Matches: 263.92519500000003

Found 155 metabolites which its exact mass value is equals to given mass value 263.92519500000003, within given mass tolerance error 0.05 dalton. Try search metabolite list with more accurate mass tolerance error 0.01 dalton.

Chlorothalonil

Chlorothalonil; Tetrachloroisophthalonitrile; Daconil; TPN

C8Cl4N2 (263.88156000000004)


D010575 - Pesticides > D008975 - Molluscacides D016573 - Agrochemicals

   

2,3,5,7,9-Pentathiadecane 2,2-dioxide

Methanesulphonyl[({[(methyldisulphanyl)methyl]sulphanyl}methyl)sulphanyl]methane

C5H12O2S5 (263.9440852)


2,3,5,7,9-Pentathiadecane 2,2-dioxide is found in mushrooms. 2,3,5,7,9-Pentathiadecane 2,2-dioxide is isolated from the shiitake mushroom (Lentinus edodes). Isolated from the shiitake mushroom (Lentinus edodes). 2,3,5,7,9-Pentathiadecane 2,2-dioxide is found in mushrooms.

   

Thioxanthine monophosphate

[(2-hydroxy-6-sulfanyl-9H-purin-9-yl)oxy]phosphonic acid

C5H5N4O5PS (263.971829)


Thioxanthine monophosphate is a metabolite of azathioprine. Azathioprine is a purine analogue immunosuppressive drug. It is used to prevent rejection following organ transplantation, and to treat a vast array of autoimmune diseases, including rheumatoid arthritis, pemphigus, inflammatory bowel disease, multiple sclerosis, autoimmune hepatitis, atopic dermatitis, myasthenia gravis, neuromyelitis optica or Devics disease, restrictive lung disease, and others. (Wikipedia)

   

1,2,3,4-Tetrachloronaphthalene

1,2,3,4-Tetrachloronaphthalene

C10H4Cl4 (263.9067104)


   

2-(2-carboxy-4-methylthiazol-5-yl)ethyl phosphate

4-methyl-5-[2-(phosphonatooxy)ethyl]-1,3-thiazole-2-carboxylate

C7H7NO6PS (263.9731712)


2-(2-carboxy-4-methylthiazol-5-yl)ethyl phosphate, also known as cthz-P, belongs to thiazolecarboxylic acids and derivatives class of compounds. Those are heterocyclic compounds containing a thiazole ring which bears a carboxylic acid group (or a derivative thereof). 2-(2-carboxy-4-methylthiazol-5-yl)ethyl phosphate is soluble (in water) and a moderately acidic compound (based on its pKa). 2-(2-carboxy-4-methylthiazol-5-yl)ethyl phosphate can be found in a number of food items such as rubus (blackberry, raspberry), triticale, fenugreek, and cloudberry, which makes 2-(2-carboxy-4-methylthiazol-5-yl)ethyl phosphate a potential biomarker for the consumption of these food products.

   

Chlorothalonil-TP SYN507900

Chlorothalonil-TP SYN507900

C8H3Cl3N2O2 (263.92601080000003)


CONFIDENCE standard compound; UCHEM_ID 4172

   
   

Fumigatin-bromhydrin

Fumigatin-bromhydrin

C8H9BrO5 (263.9633324)


   

Methanesulfonic acid, thio-, S-[[[[(methylsulfinyl)methyl]thio]methoxy]methyl] ester

Methanesulfonic acid, thio-, S-[[[[(methylsulfinyl)methyl]thio]methoxy]methyl] ester

C5H12O4S4 (263.9618432)


   
   

SE-3

methanesulfonyl[({[(methyldisulfanyl)methyl]sulfanyl}methyl)sulfanyl]methane

C5H12O2S5 (263.9440852)


   
   
   

(E)-3-(4-CHLOROPHENYL)-N-PHENYLACRYLAMIDE

(E)-3-(4-CHLOROPHENYL)-N-PHENYLACRYLAMIDE

C7H5IO3 (263.92834500000004)


   

3-SULFOBENZOIC ACID DISODIUM SALT MONOHYDRATE

3-SULFOBENZOIC ACID DISODIUM SALT MONOHYDRATE

C7H6Na2O6S (263.96804960000003)


   

1-Iodo-3,5-dimethoxybenzene

1-Iodo-3,5-dimethoxybenzene

C8H9IO2 (263.9647284)


   

4-(2-BROMOETHYL)BENZENESULFONIC ACID

4-(2-BROMOETHYL)BENZENESULFONIC ACID

C8H9BrO3S (263.9455744)


   

2-BROMO-4-(METHYLSULFONYL)PHENYL]HYDRAZINE

2-BROMO-4-(METHYLSULFONYL)PHENYL]HYDRAZINE

C7H9BrN2O2S (263.9568074)


   

2,4-Dihydroxy-5-iodobenzaldehyde

2,4-Dihydroxy-5-iodobenzaldehyde

C7H5IO3 (263.92834500000004)


   

2,4-Dihydroxy-3-iodobenzaldehyde

2,4-Dihydroxy-3-iodobenzaldehyde

C7H5IO3 (263.92834500000004)


   

4-Iodo-3-nitroaniline

4-Iodo-3-nitroaniline

C6H5IN2O2 (263.939578)


   

2-bromo-5,6-dichlorobenzimidazole

2-bromo-5,6-dichlorobenzimidazole

C7H3BrCl2N2 (263.8856638)


   
   
   
   

1,3,5-Benzenetricarbonyl chloride

1,3,5-Benzenetricarbonyl chloride

C9H3Cl3O3 (263.9147778)


   

3,5-Dibromo-4-methylpyridin-2-amine

3,5-Dibromo-4-methylpyridin-2-amine

C6H6Br2N2 (263.88976759999997)


   
   

3-IODO-4-METHOXYBENZYL ALCOHOL

3-IODO-4-METHOXYBENZYL ALCOHOL

C8H9IO2 (263.9647284)


   

2,3,5,6-Tetrachloroterephthalonitrile

2,3,5,6-Tetrachloroterephthalonitrile

C8Cl4N2 (263.88156000000004)


   

1-(METHOXYMETHYL)-3-NITROBENZENE

1-(METHOXYMETHYL)-3-NITROBENZENE

C9H7BrClFO (263.9352794)


   

diphenyl chloroarsine

diphenyl chloroarsine

C12H10AsCl (263.968695)


   

Methyldibromo glutaronitrile

1,2-Dibromo-2,4-dicyanobutane

C6H6Br2N2 (263.88976759999997)


D010592 - Pharmaceutic Aids

   
   

4-Iodo-1,2-dimethoxybenzene

4-Iodo-1,2-dimethoxybenzene

C8H9IO2 (263.9647284)


   
   

2-BROMOPHENYLSULFONYLETHANOL

2-BROMOPHENYLSULFONYLETHANOL

C8H9BrO3S (263.9455744)


   

1,2-Benziodoxol-3(1H)-one,1-hydroxy-

1-Hydroxy-3-oxo-1,3-dihydro-1,2-benzoiodoxole

C7H5IO3 (263.92834500000004)


   

2-Chloro-4-iodonicotinonitrile

2-Chloro-4-iodonicotinonitrile

C6H2ClIN2 (263.8951272)


   

5-Bromo-N-ethylpyridine-3-sulfonamide

5-Bromo-N-ethylpyridine-3-sulfonamide

C7H9BrN2O2S (263.9568074)


   
   

3,6-Dichloro-1-benzothiophene-2-carbonyl chloride

3,6-Dichloro-1-benzothiophene-2-carbonyl chloride

C9H3Cl3OS (263.8970198)


   
   
   

2-BROMO-6-CHLORO-3-METHOXYPHENYLBORONIC ACID

2-BROMO-6-CHLORO-3-METHOXYPHENYLBORONIC ACID

C7H7BBrClO3 (263.9360112)


   

5-Bromo-N,N-dimethylpyridine-3-sulfonamide

5-Bromo-N,N-dimethylpyridine-3-sulfonamide

C7H9BrN2O2S (263.9568074)


   

Ethyl 5-bromo-2,3-difluorobenzoate

Ethyl 5-bromo-2,3-difluorobenzoate

C9H7BrF2O2 (263.9597446)


   
   

[5-(hydroxymethyl)-2-(trichloromethyl)-1,3-dioxan-5-yl]methanol

[5-(hydroxymethyl)-2-(trichloromethyl)-1,3-dioxan-5-yl]methanol

C7H11Cl3O4 (263.9722896)


   
   

4-bromo-6-(trifluoromethyl)benzimidazole

4-bromo-6-(trifluoromethyl)benzimidazole

C8H4BrF3N2 (263.950992)


   

6-Bromo-2-chloro-3-methoxyphenylboronic acid

6-Bromo-2-chloro-3-methoxyphenylboronic acid

C7H7BBrClO3 (263.9360112)


   
   

4-Bromophenyl phenyl sulfide

4-Bromophenyl phenyl sulfide

C12H9BrS (263.9608294)


   
   

(4-BOC-AMINO-PIPERIDIN-1-YL)-THIOPHEN-3-YL-ACETICACID

(4-BOC-AMINO-PIPERIDIN-1-YL)-THIOPHEN-3-YL-ACETICACID

C8H6BrClO3 (263.91888159999996)


   

3-Bromo-2-chloro-6-methoxyphenylboronic acid

3-Bromo-2-chloro-6-methoxyphenylboronic acid

C7H7BBrClO3 (263.9360112)


   

4-Bromo-6-(trifluoromethyl)-1H-indazole

4-Bromo-6-(trifluoromethyl)-1H-indazole

C8H4BrF3N2 (263.950992)


   
   

2-Iodosobenzoic acid

2-Iodosylbenzoic acid

C7H5IO3 (263.92834500000004)


D004791 - Enzyme Inhibitors

   

4-Iodo-2-nitroaniline

4-Iodo-2-nitroaniline

C6H5IN2O2 (263.939578)


   

2-AMINO-4-CHLOROBENZOTHIAZOLE HYDROBROMIDE

2-AMINO-4-CHLOROBENZOTHIAZOLE HYDROBROMIDE

C7H6BrClN2S (263.9123566)


   

3-bromo-4-methoxybenzenecarboximidamide,hydrochloride

3-bromo-4-methoxybenzenecarboximidamide,hydrochloride

C8H10BrClN2O (263.966498)


   

2-Iodo-5-nitroaniline

2-Iodo-5-nitroaniline

C6H5IN2O2 (263.939578)


   
   

(4-BOC-AMINO-PIPERIDIN-1-YL)-THIOPHEN-2-YL-ACETICACID

(4-BOC-AMINO-PIPERIDIN-1-YL)-THIOPHEN-2-YL-ACETICACID

C7H7BBrClO3 (263.9360112)


   

Phosphinous bromide,P,P-diphenyl-

Phosphinous bromide,P,P-diphenyl-

C12H10BrP (263.970345)


   

Imidazo[1,2-a]pyridine, 6-bromo-2-(trifluoromethyl)-

Imidazo[1,2-a]pyridine, 6-bromo-2-(trifluoromethyl)-

C8H4BrF3N2 (263.950992)


   

Methyl 4-bromo-3-methoxy-5-methylthiophene-2-carboxylate

Methyl 4-bromo-3-methoxy-5-methylthiophene-2-carboxylate

C8H9BrO3S (263.9455744)


   

4-Bromo-1-chloro-2-(2-methoxyethoxy)benzene

4-Bromo-1-chloro-2-(2-methoxyethoxy)benzene

C9H10BrClO2 (263.955265)


   

5-Bromo-3-(trifluoromethyl)-1H-indazole

5-Bromo-3-(trifluoromethyl)-1H-indazole

C8H4BrF3N2 (263.950992)


   
   
   

1-iodo-2-(methoxymethoxy)benzene

1-iodo-2-(methoxymethoxy)benzene

C8H9IO2 (263.9647284)


   
   

Sodium 3,5-dichloro-2-hydroxybenzenesulfonate

Sodium 3,5-dichloro-2-hydroxybenzenesulfonate

C6H3Cl2NaO4S (263.90268180000004)


   

2,4-Dimethoxyiodobenzene

2,4-Dimethoxyiodobenzene

C8H9IO2 (263.9647284)


   

Methyl 5-bromo-4-chloro-2-hydroxybenzoate

Methyl 5-bromo-4-chloro-2-hydroxybenzoate

C8H6BrClO3 (263.91888159999996)


   

Methyl 3-iodo-2-pyrazinecarboxylate

Methyl 3-iodo-2-pyrazinecarboxylate

C6H5IN2O2 (263.939578)


   

1-Bromo-4-[(3-chloropropyl)sulfanyl]benzene

1-Bromo-4-[(3-chloropropyl)sulfanyl]benzene

C9H10BrClS (263.937507)


   

1-bromo-2-(chloromethyl)-4,5-dimethoxy-benzene

1-bromo-2-(chloromethyl)-4,5-dimethoxy-benzene

C9H10BrClO2 (263.955265)


   

4-IODO-2-METHOXYBENZYL ALCOHOL

4-IODO-2-METHOXYBENZYL ALCOHOL

C8H9IO2 (263.9647284)


   
   

2-Bromo-1-[4-(difluoromethoxy)phenyl]ethanone

2-Bromo-1-[4-(difluoromethoxy)phenyl]ethanone

C9H7BrF2O2 (263.9597446)


   

2-Chloro-3-iodoisonicotinonitrile

2-Chloro-3-iodoisonicotinonitrile

C6H2ClIN2 (263.8951272)


   

2-AMINO-5-IODONICOTINIC ACID

2-AMINO-5-IODONICOTINIC ACID

C6H5IN2O2 (263.939578)


   

5-Fluoro-2-iodoacetophenone

5-Fluoro-2-iodoacetophenone

C8H6FIO (263.9447428)


   
   

3-(2-Bromo-4,5-difluorophenyl)propanoic acid

3-(2-Bromo-4,5-difluorophenyl)propanoic acid

C9H7BrF2O2 (263.9597446)


   

5,6-DIHYDRO-6-METHYL-4-OXO-4H-THIENO[2,3-B]THIOPYRAN-2-SULFONIC ACIS

5,6-DIHYDRO-6-METHYL-4-OXO-4H-THIENO[2,3-B]THIOPYRAN-2-SULFONIC ACIS

C8H8O4S3 (263.9584728)


   

3-Amino-6-iodopyrazine-2-carboxamide

3-Amino-6-iodopyrazine-2-carboxamide

C5H5IN4O (263.950811)


   

5-Bromo-4-(trifluoromethyl)-1H-pyrrolo[2,3-b]pyridine

5-Bromo-4-(trifluoromethyl)-1H-pyrrolo[2,3-b]pyridine

C8H4BrF3N2 (263.950992)


   
   

Methyl 3-bromo-5-chloro-2-hydroxybenzoate

Methyl 3-bromo-5-chloro-2-hydroxybenzoate

C8H6BrClO3 (263.91888159999996)


   

Ethyl 2-bromo-4,5-difluorobenzoate

Ethyl 2-bromo-4,5-difluorobenzoate

C9H7BrF2O2 (263.9597446)


   

2-Iodo-1,3-dimethoxybenzene

2-Iodo-1,3-dimethoxybenzene

C8H9IO2 (263.9647284)


   

1-(3,4-DIMETHOXY-BENZYL)-PIPERAZINE

1-(3,4-DIMETHOXY-BENZYL)-PIPERAZINE

C7H9BrN2O4 (263.9745654)


   

4-Amino-5-bromo-2-(trifluoromethyl)benzonitrile

4-Amino-5-bromo-2-(trifluoromethyl)benzonitrile

C8H4BrF3N2 (263.950992)


   

2-Iodo-4-methyl-5-nitropyridine

2-Iodo-4-methyl-5-nitropyridine

C6H5IN2O2 (263.939578)


   

4-bromo-3-(trifluoromethyl)-1H-indazole

4-bromo-3-(trifluoromethyl)-1H-indazole

C8H4BrF3N2 (263.950992)


   

1-iodo-2,3-dimethoxybenzene

1-iodo-2,3-dimethoxybenzene

C8H9IO2 (263.9647284)


   
   

Benzenamine,3-iodo-5-nitro-

Benzenamine,3-iodo-5-nitro-

C6H5IN2O2 (263.939578)


   

1-bromo-4-chloro-2-(2-methoxyethoxy)benzene

1-bromo-4-chloro-2-(2-methoxyethoxy)benzene

C9H10BrClO2 (263.955265)


   

2-iodo-6-methoxyBenzenemethanol

2-iodo-6-methoxyBenzenemethanol

C8H9IO2 (263.9647284)


   

2-Chloro-5-iodonicotinonitrile

2-Chloro-5-iodonicotinonitrile

C6H2ClIN2 (263.8951272)


   
   

5-Fluoro-3-methyl-1-benzothiophene-2-sulfonyl chloride

5-Fluoro-3-methyl-1-benzothiophene-2-sulfonyl chloride

C9H6ClFO2S2 (263.94817780000005)


   

7-BROMO-2,3-DIHYDROTHIENO[3,4-B][1,4]DIOXINE-5-CARBOXYLIC ACID

7-BROMO-2,3-DIHYDROTHIENO[3,4-B][1,4]DIOXINE-5-CARBOXYLIC ACID

C7H5BrO4S (263.909191)


   

trisodium,2-sulfonatobutanedioate

trisodium,2-sulfonatobutanedioate

C4H3Na3O7S (263.9292608)


   

2-(2-iodophenoxy)ethanol

2-(2-iodophenoxy)ethanol

C8H9IO2 (263.9647284)


   

METHYL 3-AMINO-6-BROMO-5-CHLOROPICOLINATE

METHYL 3-AMINO-6-BROMO-5-CHLOROPICOLINATE

C7H6BrClN2O2 (263.93011459999997)


   

2-Iodo-4-nitroaniline

2-Iodo-4-nitroaniline

C6H5IN2O2 (263.939578)


   

1,3,4-Thiadiazolidine-2,5-dithione,3-phenyl-, potassium salt (1:1)

1,3,4-Thiadiazolidine-2,5-dithione,3-phenyl-, potassium salt (1:1)

C8H5KN2S3 (263.92519500000003)


   

Sodium selenite pentahydrate

Sodium selenite hydrate (2:1:5)

H10Na2O8Se (263.933627)


D018977 - Micronutrients > D014131 - Trace Elements

   
   

(R)-2-((5-BROMO-2,3-DIFLUOROPHENOXY)METHYL)OXIRANE

(R)-2-((5-BROMO-2,3-DIFLUOROPHENOXY)METHYL)OXIRANE

C9H7BrF2O2 (263.9597446)


   
   

3,3-Carbonylbis-2-thiazolidinethione

3,3-Carbonylbis-2-thiazolidinethione

C7H8N2OS4 (263.95194779999997)


   

4-bromo-3-chloro-N-methyl-2-nitroaniline

4-bromo-3-chloro-N-methyl-2-nitroaniline

C7H6BrClN2O2 (263.93011459999997)


   

5-bromo-3-(trifluoromethyl)benzofuran

5-bromo-3-(trifluoromethyl)benzofuran

C9H4BrF3O (263.939759)


   

2-iodo-4-methyl-3-nitropyridine

2-iodo-4-methyl-3-nitropyridine

C6H5IN2O2 (263.939578)


   

3,4,6-trichloro-5-(trifluoroMethyl)pyridin-2-aMine

3,4,6-trichloro-5-(trifluoroMethyl)pyridin-2-aMine

C6H2Cl3F3N2 (263.9235658)


   

1-(2-fluoro-4-iodophenyl)ethanone

1-(2-fluoro-4-iodophenyl)ethanone

C8H6FIO (263.9447428)


   

3-(Trifluoromethoxy)phenylmagnesium bromide 0.5 in THF

3-(Trifluoromethoxy)phenylmagnesium bromide 0.5 in THF

C7H4BrF3MgO (263.924809)


   

Methyl 6-aMino-5-broMo-3-chloropicolinate

Methyl 6-aMino-5-broMo-3-chloropicolinate

C7H6BrClN2O2 (263.93011459999997)


   

5-Bromo-4-chloro-2-methoxybenzoic acid

5-Bromo-4-chloro-2-methoxybenzoic acid

C8H6BrClO3 (263.91888159999996)


   

Ethyl 4,6-dichloro-5-nitronicotinate

Ethyl 4,6-dichloro-5-nitronicotinate

C8H6Cl2N2O4 (263.9704616)


   

3-Bromo-6-(trifluoromethyl)imidazo[1,2-a]pyridine

3-Bromo-6-(trifluoromethyl)imidazo[1,2-a]pyridine

C8H4BrF3N2 (263.950992)


   

(2-AMINO-5-BROMOTHIAZOL-4-YL)OXOACETIC ACID METHYL ESTER

(2-AMINO-5-BROMOTHIAZOL-4-YL)OXOACETIC ACID METHYL ESTER

C6H5BrN2O3S (263.920424)


   

9-Bromo-[1,2,4]triazolo[1,5-c]quinazolin-5(6H)-one

9-Bromo-[1,2,4]triazolo[1,5-c]quinazolin-5(6H)-one

C9H5BrN4O (263.96467)


   

IMIDAZO[1,2-A]PYRIDINE, 3-BROMO-2-(TRIFLUOROMETHYL)-

IMIDAZO[1,2-A]PYRIDINE, 3-BROMO-2-(TRIFLUOROMETHYL)-

C8H4BrF3N2 (263.950992)


   

3-Bromo-5-(trifluoromethyl)-7-azaindole

3-Bromo-5-(trifluoromethyl)-7-azaindole

C8H4BrF3N2 (263.950992)


   

1,2,3,4-Tetrachloronaphthalene

1,2,3,4-Tetrachloronaphthalene

C10H4Cl4 (263.9067104)


   

5h-octafluoropentanoyl chloride

5h-octafluoropentanoyl chloride

C5HClF8O (263.9588182)


   

4-bromo-1-Methoxy-2-(Methylsulfonyl)benzene

4-bromo-1-Methoxy-2-(Methylsulfonyl)benzene

C8H9BrO3S (263.9455744)


   
   
   

4-Amino-3,5-dibromo-2-methylpyridine

4-Amino-3,5-dibromo-2-methylpyridine

C6H6Br2N2 (263.88976759999997)


   

3,4-DICHLOROBENZO[B]THIOPHENE-2-CARBONYL CHLORIDE

3,4-DICHLOROBENZO[B]THIOPHENE-2-CARBONYL CHLORIDE

C9H3Cl3OS (263.8970198)


   

2-Iodo-1,4-dimethoxybenzene

2-Iodo-1,4-dimethoxybenzene

C8H9IO2 (263.9647284)


   
   

6-Chloro-4-iodonicotinonitrile

6-Chloro-4-iodonicotinonitrile

C6H2ClIN2 (263.8951272)


   

2,3,6-Trichloro-5-cyano-4-hydroxybenzamide

2,3,6-Trichloro-5-cyano-4-hydroxybenzamide

C8H3Cl3N2O2 (263.92601080000003)


   
   
   

2-[(2R,5Z)-2-Carboxy-4-methylthiazol-5(2H)-ylidene]ethyl phosphate

2-[(2R,5Z)-2-Carboxy-4-methylthiazol-5(2H)-ylidene]ethyl phosphate

C7H7NO6PS-3 (263.9731712)


   

4-iodobutylphosphonic Acid

4-iodobutylphosphonic Acid

C4H10IO3P (263.941231)


   

(E)-2-bromo-4,6-dioxohept-2-enedioic acid

(E)-2-bromo-4,6-dioxohept-2-enedioic acid

C7H5BrO6 (263.92694900000004)


   

(TBPY-5)-pentaoxotungstate(4-)

(TBPY-5)-pentaoxotungstate(4-)

O5W-4 (263.925528)


   

4-Methyl-5-[2-(phosphonatooxy)ethylidene]-2,5-dihydro-1,3-thiazole-2-carboxylate

4-Methyl-5-[2-(phosphonatooxy)ethylidene]-2,5-dihydro-1,3-thiazole-2-carboxylate

C7H7NO6PS-3 (263.9731712)


   

Daconil

Tetrachloroisophthalonitrile

C8Cl4N2 (263.88156000000004)


D010575 - Pesticides > D008975 - Molluscacides D016573 - Agrochemicals

   

2,3,5,7,9-Pentathiadecane 2,2-dioxide

2,3,5,7,9-Pentathiadecane 2,2-dioxide

C5H12O2S5 (263.9440852)


   

Thioxanthine monophosphate

Thioxanthine monophosphate

C5H5N4O5PS (263.971829)


   

(R,Z)- 2-carboxylato-4-methyl-5-[(2-phosphonatooxy)ethylidene]-2,5-dihydrothiazole(3-)

(R,Z)- 2-carboxylato-4-methyl-5-[(2-phosphonatooxy)ethylidene]-2,5-dihydrothiazole(3-)

C7H7NO6PS (263.9731712)


The organophosphate oxoanion that is the 2R,5Z isomer of 2-carboxylato-4-methyl-5-[(2-phosphonatooxy)ethylidene]-2,5-dihydrothiazole(3-); protonated to pH 7.3.