Building Blocks

This section contains fundamental products for the synthesis of organic and biological compounds. Building blocks are the essential starting materials used to construct complex molecules through various chemical reactions. They play a critical role in drug discovery, material science, and chemical research. At CymitQuimica, we offer a diverse range of high-quality building blocks to support your innovative research and industrial projects, ensuring you have the essential components for successful synthesis.

Boronic Acids & Boronic Acid Derivatives

Chiral Building Blocks

Hydrocarbon Building Blocks

Organic Building Blocks

Products of "Building Blocks"

100
- 20
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- 200

products per page. 262678 products on this category.

Product data	Purity	Price range	Estimated delivery
(2-{Hexahydro-1H-pyrrolo[2,1-c]morpholin-3-yl}pyrimidin-4-yl)methanol REF: 3D-CKC49881CAS: 1502498-81-8	Min. 95%	To inquire	Thu 02 Jan 25
1-(1-Hydroxy-2-phenylethyl)-2,3-dihydro-1H-indene-1-carbonitrile REF: 3D-CKC49916CAS: 1502499-16-2	Min. 95%	To inquire	Thu 02 Jan 25
3-(Bromomethyl)-2,4-dimethylpentane REF: 3D-CKC51533CAS: 1502515-33-4	Min. 95%	To inquire	Thu 02 Jan 25
4-Bromo-1-(3-methoxypropanesulfonyl)piperidine REF: 3D-CKC57929CAS: 1502579-29-4	Min. 95%	To inquire	Thu 02 Jan 25
2-Oxaspiro[3.5]nonan-7-amine REF: 3D-CKC58043CAS: 1502580-43-9	Min. 95%	53.00 €~887.00 €	Thu 02 Jan 25
4-(4-Bromo-1,3-thiazol-2-yl)thiomorpholine REF: 3D-CKC63059CAS: 1502630-59-2	Min. 95%	To inquire	Thu 02 Jan 25
4-Cyano-3-nitrobenzene-1-sulfonyl chloride REF: 3D-CKC63784CAS: 1502637-84-4	Min. 95%	To inquire	Thu 02 Jan 25
2-(1-Chloroethyl)pyrimidin-4-amine REF: 3D-CKC65124CAS: 1502651-24-2	Min. 95%	To inquire	Thu 02 Jan 25
5-Cyclopropyl-1H-1,2,4-triazole-3-carboxamide REF: 3D-CKC67373CAS: 1502673-73-5	Min. 95%	To inquire	Thu 02 Jan 25
Methyl 5-bromo-2-chloro-4-fluorobenzoate REF: 3D-CKC71731CAS: 1502717-31-8	Min. 95%	To inquire	Thu 02 Jan 25
2-(3-Acetylphenyl)-4-methyl-1,2-thiazolidine-1,1-dione REF: 3D-CKC73171CAS: 1502731-71-6	Min. 95%	To inquire	Thu 02 Jan 25
2-[(1,1,1-Trifluoropropan-2-yl)oxy]pyridine-3-carboxylic acid REF: 3D-CKC73285CAS: 1502732-85-5	Min. 95%	To inquire	Thu 02 Jan 25
2-(3-Chlorophenyl)-4,4,4-trifluorobutanoic acid REF: 3D-CKC75886CAS: 1502758-86-2	Min. 95%	To inquire	Thu 02 Jan 25
2-N-Methyl-2-N-[(4-methylphenyl)methyl]-1,3-benzoxazole-2,5-diamine REF: 3D-CKC76800CAS: 1502768-00-4	Min. 95%	To inquire	Thu 02 Jan 25
Furan-2-yl(1H-imidazol-2-yl)methanol REF: 3D-CKC76859CAS: 1502768-59-3	Min. 95%	To inquire	Thu 02 Jan 25
3-Bromo-8-chloroimidazo[1,5-a]pyrazine REF: 3D-CKC77660CAS: 1502776-60-4	Min. 95%	To inquire	Thu 02 Jan 25
Methyl 2-((2,2,2-trifluoroethyl)amino)propanoate REF: 3D-CKC81968CAS: 1502819-68-2	Min. 95%	To inquire	Thu 02 Jan 25
Methyl 2-bromo-5-chloro-4-fluorobenzoate REF: 3D-CKC83528CAS: 1502835-28-0	Min. 95%	To inquire	Thu 02 Jan 25
3-(4-Methylpyridin-3-yl)propanal REF: 3D-CKC95802CAS: 1502958-02-2	Min. 95%	To inquire	Thu 02 Jan 25
2-(6-Methoxy-1-methyl-1H-1,3-benzodiazol-2-yl)ethan-1-ol REF: 3D-CKC97679CAS: 1502976-79-5	Min. 95%	To inquire	Thu 02 Jan 25
Methyl 2,2-dimethyl-3-(propylsulfanyl)propanoate REF: 3D-CKC98210CAS: 1502982-10-6	Min. 95%	To inquire	Thu 02 Jan 25
5-Bromo-1H-pyrazole-4-carboxylic acid REF: 3D-CKC98645CAS: 1502986-45-9	Min. 95%	To inquire	Thu 02 Jan 25
6-{[(9H-Fluoren-9-yl)methoxy]carbonyl}-6-azaspiro[3.4]octane-8-carboxylic acid REF: 3D-CKD01232CAS: 2127012-32-0	Min. 95%	To inquire	Thu 02 Jan 25
2-{[(9H-Fluoren-9-yl)methoxy]carbonyl}-1H,2H,3H,4H,5H-pyrido[4,3-b]indole-6-carboxylic acid REF: 3D-CKD01269CAS: 2127012-69-3	Min. 95%	To inquire	Thu 02 Jan 25
Methyl 2-ao-3-methylpentanoate hydrochloride REF: 3D-CKD17524CAS: 2127175-24-8	Min. 95%	To inquire	Thu 02 Jan 25
1-{[(9H-Fluoren-9-yl)methoxy]carbonyl}-3-(methoxymethyl)piperidine-3-carboxylic acid REF: 3D-CKD24079CAS: 2127240-79-1	Min. 95%	To inquire	Thu 02 Jan 25
2-Cyano-N-{4-[(difluoromethyl)sulfanyl]phenyl}acetamide REF: 3D-CRA48052CAS: 402480-52-8	Min. 95%	To inquire	Thu 02 Jan 25
1-(3,5-dichloropyridin-4-yl)ethan-1-one REF: 3D-CRA56166CAS: 402561-66-4	Min. 95%	To inquire	Thu 02 Jan 25
Methyl 5-[(3-chlorophenoxy)methyl]-2-furoate REF: 3D-CRA60196CAS: 402601-96-1	Min. 95%	To inquire	Thu 02 Jan 25
5-(4-Propyl-phenoxymethyl)-furan-2-carboxylic acid methyl ester REF: 3D-CRA60298CAS: 402602-98-6	Min. 95%	To inquire	Thu 02 Jan 25
5-[(4-Chloro-5-methyl-3-nitro-1H-pyrazol-1-yl)methyl]furan-2-carboxylic acid REF: 3D-CRA61416CAS: 402614-16-8	Min. 95%	To inquire	Thu 02 Jan 25
5-(3,4-Dimethyl-phenoxymethyl)-furan-2-carboxylic acid methyl ester REF: 3D-CRA61464CAS: 402614-64-6	Min. 95%	To inquire	Thu 02 Jan 25
5-(3,5-Dimethyl-4-nitro-pyrazol-1-ylmethyl)-furan-2-carboxylic acid methyl ester REF: 3D-CRA61700CAS: 402617-00-9	Min. 95%	To inquire	Thu 02 Jan 25
3-[(4-Chloro-3-nitro-1H-pyrazol-1-yl)methyl]benzoic acid REF: 3D-CRA72000CAS: 402720-00-7	Min. 95%	To inquire	Thu 02 Jan 25
4-[(3-Nitro-1H-1,2,4-triazol-1-yl)methyl]benzoic acid REF: 3D-CRA72088CAS: 402720-88-1	Min. 95%	To inquire	Thu 02 Jan 25
5-(Pentafluorophenoxymethyl)furan-2-carboxylic acid REF: 3D-CRA72783CAS: 402727-83-7	Min. 95%	To inquire	Thu 02 Jan 25
3-[(3-Nitro-1H-pyrazol-1-yl)methyl]benzoic acid REF: 3D-CRA72932CAS: 402729-32-2	Min. 95%	To inquire	Thu 02 Jan 25
5-(Naphthalen-2-yloxymethyl)-furan-2-carboxylic acid methyl ester REF: 3D-CRA73634CAS: 402736-34-9	Min. 95%	To inquire	Thu 02 Jan 25
Methyl 5-[(2,3-dihydro-1H-inden-5-yloxy)methyl]-2-furoate REF: 3D-CRA73726CAS: 402737-26-2	Min. 95%	To inquire	Thu 02 Jan 25
5-{[4-(Butan-2-yl)phenoxy]methyl}furan-2-carboxylic acid REF: 3D-CRA74578CAS: 402745-78-2	Min. 95%	To inquire	Thu 02 Jan 25
2-(4-Fluorophenyl)butan-2-amine REF: 3D-CRA75706CAS: 402757-06-6	Min. 95%	To inquire	Thu 02 Jan 25
2-(2-Nitrophenyl)propan-2-amine REF: 3D-CRA75708CAS: 402757-08-8	Min. 95%	To inquire	Thu 02 Jan 25
5-(Naphthalen-1-yloxymethyl)furan-2-carboxylic acid REF: 3D-CRA76766CAS: 402767-66-2	Min. 95%	To inquire	Thu 02 Jan 25
Methyl 5-[(4-bromophenoxy)methyl]-2-furoate REF: 3D-CRA77133CAS: 402771-33-9	Min. 95%	To inquire	Thu 02 Jan 25
Methyl 5-[(4-ethylphenoxy)methyl]-2-furoate REF: 3D-CRA77224CAS: 402772-24-1	Min. 95%	To inquire	Thu 02 Jan 25
(2'-Methyl-[1,1'-biphenyl]-2-yl)diphenylphosphine REF: 3D-CRA82272CAS: 402822-72-4	Min. 95%	To inquire	Thu 02 Jan 25
Carbamic acid, (3-formyl-4-hydroxyphenyl)-, 1,1-dimethylethyl ester REF: 3D-CRA82643CAS: 402826-43-1	Min. 95%	To inquire	Thu 02 Jan 25
2-(2-Fluoro-4-methoxyphenyl)ethanamine REF: 3D-CRA83276CAS: 402832-76-2	Min. 95%	To inquire	Thu 02 Jan 25
2-Acetoxy-N-(2-thiazolyl)benzamide REF: 3D-CRA84876CAS: 402848-76-4	Min. 95%	To inquire	Thu 02 Jan 25
tert-Butyl 2,4-dioxo-1,2,3,4-tetrahydropyrimidine-1-carboxylate REF: 3D-CRA84896CAS: 402848-96-8	Min. 95%	To inquire	Thu 02 Jan 25
tert-Butyl 5-bromo-2,4-dioxo-1,2,3,4-tetrahydropyrimidine-1-carboxylate REF: 3D-CRA84899CAS: 402848-99-1	Min. 95%	To inquire	Thu 02 Jan 25
Spiro[4.6]undec-3-en-2-one REF: 3D-CRA85809CAS: 402858-09-7	Min. 95%	To inquire	Thu 02 Jan 25
Ethyl(2-phenylbutyl)amine REF: 3D-CRA92083CAS: 402920-83-6	Min. 95%	To inquire	Thu 02 Jan 25
[1-(2-Aminophenyl)piperidin-4-yl]methanol REF: 3D-CRA92476CAS: 402924-76-9	Min. 95%	To inquire	Thu 02 Jan 25
4-(cbz-amino)-1-(methylsulfonyl)piperidine REF: 3D-CRA92796CAS: 402927-96-2	Min. 95%	To inquire	Thu 02 Jan 25
4-(Ethylsulfanyl)butan-2-amine REF: 3D-CRA92809CAS: 402928-09-0	Min. 95%	To inquire	Thu 02 Jan 25
(3S)-3-(((Benzyloxy)carbonyl)amino)-2-hydroxyhexanoic acid REF: 3D-CRA95933CAS: 402959-33-5	Min. 95%	To inquire	Thu 02 Jan 25
6-Chloro-2-ethylbenzoxazole REF: 3D-CRB01912CAS: 1027019-12-0	Min. 95%	To inquire	Thu 02 Jan 25
3-[3-(Benzyloxy)phenyl]propanenitrile REF: 3D-CRB08248CAS: 1027082-48-9	Min. 95%	To inquire	Thu 02 Jan 25
3-Phenylfuran-2-carbonitrile REF: 3D-CRB08503CAS: 1027085-03-5	Min. 95%	To inquire	Thu 02 Jan 25
tert-Butyl N-(4-aminobutyl)-N-(benzyloxy)carbamate REF: 3D-CRB40837CAS: 1027408-37-2	Min. 95%	To inquire	Thu 02 Jan 25
ethyl 6-bromopyrazolo[1,5-a]pyrimidine-3-carboxylate REF: 3D-CRB51141CAS: 1027511-41-6	Min. 95%	To inquire	Thu 02 Jan 25
1-Boc-2-propyl-piperazine REF: 3D-CRB51167CAS: 1027511-67-6	Min. 95%	To inquire	Thu 02 Jan 25
1-Boc-2-butyl-piperazine REF: 3D-CRB51169CAS: 1027511-69-8	Min. 95%	To inquire	Thu 02 Jan 25
1-Boc-3-butyl-piperazine REF: 3D-CRB51170CAS: 1027511-70-1	Min. 95%	To inquire	Thu 02 Jan 25
1-Acetylazepane-4-carboxylic acid REF: 3D-CRB51194CAS: 1027511-94-9	Min. 95%	To inquire	Thu 02 Jan 25
1-(6-Bromopyridin-2-yl)pyrrolidin-2-one REF: 3D-CRB51195CAS: 1027511-95-0	Min. 95%	To inquire	Thu 02 Jan 25
1-(5-Bromopyrazin-2-yl)pyrrolidin-2-one REF: 3D-CRB51229CAS: 1027512-29-3	Min. 95%	187.00 €~1,567.00 €	Thu 02 Jan 25
1-Methylazepane-4-carboxylic acid REF: 3D-CRB51262CAS: 1027512-62-4	Min. 95%	To inquire	Thu 02 Jan 25
3-Fluoro-5-iodobenzotrifluoride REF: 3D-CRB51314CAS: 1027513-14-9	Min. 95%	To inquire	Thu 02 Jan 25
6-Bromopyridazine-3-carbonitrile REF: 3D-CRB51340CAS: 1027513-40-1	Min. 95%	To inquire	Thu 02 Jan 25
Ethyl 3-fluoro-4-iodobenzoate REF: 3D-CRB51343CAS: 1027513-43-4	Min. 95%	To inquire	Thu 02 Jan 25
Methyl 3-fluoro-4-iodobenzoate REF: 3D-CRB51346CAS: 1027513-46-7	Min. 95%	To inquire	Thu 02 Jan 25
1-Bromo-2-(2,2,2-trifluoroethyl)benzene REF: 3D-CRB51381CAS: 1027513-81-0	Min. 95%	To inquire	Thu 02 Jan 25
2,2-Difluoro-2-(3-chlorophenyl)acetic acid REF: 3D-CRB51391CAS: 1027513-91-2	Min. 95%	To inquire	Thu 02 Jan 25
α,α-Difluoro-2-(4-methoxyphenyl)acetic acid REF: 3D-CRB51397CAS: 1027513-97-8	Min. 95%	To inquire	Thu 02 Jan 25
2,2-Difluoro-2-(3-methoxyphenyl)acetic acid REF: 3D-CRB51399CAS: 1027513-99-0	Min. 95%	To inquire	Thu 02 Jan 25
Ethyl 1-(3-cyanophenyl)-1H-pyrazole-3-carboxylate REF: 3D-CRB55130CAS: 1027551-30-9	Min. 95%	To inquire	Thu 02 Jan 25
3-(4-Fluoro-3-methylphenyl)phenol REF: 3D-CRB60145CAS: 1027601-45-1	Min. 95%	To inquire	Thu 02 Jan 25
2-Chloro-N-{4-[ethyl(propan-2-yl)amino]phenyl}acetamide hydrochloride REF: 3D-CRB64327CAS: 1027643-27-1	Min. 95%	To inquire	Thu 02 Jan 25
(R)-1-(Benzo[b]thiophen-3-yl)ethanamine hydrochloride REF: 3D-CRB70985CAS: 1027709-85-8	Min. 95%	To inquire	Thu 02 Jan 25
3-(4-Chloro-3-nitrophenyl)prop-2-enenitrile REF: 3D-CRB72044CAS: 1027720-44-0	Min. 95%	To inquire	Thu 02 Jan 25
tert-Butyl [4-(S-methylsulfonimidoyl)phenyl]carbamate REF: 3D-CRB73026CAS: 1027730-26-2	Min. 95%	To inquire	Thu 02 Jan 25
3-(Methylsulfinyl)phenylacetic acid REF: 3D-CRB73068CAS: 1027730-68-2	Min. 95%	To inquire	Thu 02 Jan 25
Methyl 3-[imino(methyl)oxo-λ⁶-sulfanyl]benzoate REF: 3D-CRB73086CAS: 1027730-86-4	Min. 95%	To inquire	Thu 02 Jan 25
(3-Methylquinolin-2-yl)methanamine REF: 3D-CRB76354CAS: 1027763-54-7	Min. 95%	To inquire	Thu 02 Jan 25
4,7,8-Trichloroquinazoline REF: 3D-CRB77518CAS: 1027775-18-3	Min. 95%	To inquire	Thu 02 Jan 25
Methyl 5-(chloromethyl)-1,2-oxazole-4-carboxylate REF: 3D-CRB78188CAS: 1027781-88-9	Min. 95%	To inquire	Thu 02 Jan 25
6-Amino-5-bromonicotinaldehyde REF: 3D-CRB78521CAS: 1027785-21-2	Min. 95%	To inquire	Thu 02 Jan 25
4-Chloro-5-iodo-2-(trifluoromethyl)pyridine REF: 3D-CRB81888CAS: 1027818-88-7	Min. 95%	To inquire	Thu 02 Jan 25
5-Iodo-2-(trifluoromethyl)pyridin-4-ol REF: 3D-CRB81889CAS: 1027818-89-8	Min. 95%	To inquire	Thu 02 Jan 25
tert-Butyl 4-(2-cyano-4-methylphenyl)piperazine-1-carboxylate REF: 3D-CRB91178CAS: 1027911-78-9	Min. 95%	To inquire	Thu 02 Jan 25
6-Bromo-4,4-dimethyl-chroman REF: 3D-CRB91516CAS: 1027915-16-7	Min. 95%	To inquire	Thu 02 Jan 25
1-Boc-3-(benzyloxy)azetidine REF: 3D-CRB99571CAS: 1027995-71-6	Min. 95%	To inquire	Thu 02 Jan 25
5-Amino-2-(propan-2-yloxy)benzonitrile REF: 3D-CRB99704CAS: 1027997-04-1	Min. 95%	To inquire	Thu 02 Jan 25
N-(2-Methylcyclopropyl)aniline REF: 3D-CRC59628CAS: 1652596-28-5	Min. 95%	To inquire	Thu 02 Jan 25
rac-Methyl (3R,4R)-4-(oxolan-3-yl)pyrrolidine-3-carboxylate REF: 3D-CRD62961CAS: 2277629-61-3	Min. 95%	To inquire	Thu 02 Jan 25
1-[4-(Trifluoromethoxy)phenyl]ethane-1-thiol REF: 3D-CSA87687CAS: 427876-87-7	Min. 95%	To inquire	Thu 02 Jan 25
2-Benzylamino-6-bromopyridine REF: 3D-CSA90017CAS: 427900-17-2	Min. 95%	To inquire	Thu 02 Jan 25
tert-Butyl 2-(2-oxocyclopentyl)pyrrolidine-1-carboxylate REF: 3D-CSA92308CAS: 427923-08-8	Min. 95%	To inquire	Thu 02 Jan 25

5mg		198.00 €
50mg		744.00 €

25mg		297.00 €
250mg		1,110.00 €

25mg		197.00 €
250mg		783.00 €

25mg		330.00 €
250mg		1,238.00 €

Building Blocks

Subcategories of "Building Blocks"

Boronic Acids & Boronic Acid Derivatives

Chiral Building Blocks

Hydrocarbon Building Blocks

Organic Building Blocks

Products of "Building Blocks"

(2-{Hexahydro-1H-pyrrolo[2,1-c]morpholin-3-yl}pyrimidin-4-yl)methanol

Ref: 3D-CKC49881

1-(1-Hydroxy-2-phenylethyl)-2,3-dihydro-1H-indene-1-carbonitrile

Ref: 3D-CKC49916

3-(Bromomethyl)-2,4-dimethylpentane

Ref: 3D-CKC51533

4-Bromo-1-(3-methoxypropanesulfonyl)piperidine

Ref: 3D-CKC57929

2-Oxaspiro[3.5]nonan-7-amine

Ref: 3D-CKC58043

4-(4-Bromo-1,3-thiazol-2-yl)thiomorpholine

Ref: 3D-CKC63059

4-Cyano-3-nitrobenzene-1-sulfonyl chloride

Ref: 3D-CKC63784

2-(1-Chloroethyl)pyrimidin-4-amine

Ref: 3D-CKC65124

5-Cyclopropyl-1H-1,2,4-triazole-3-carboxamide

Ref: 3D-CKC67373

Methyl 5-bromo-2-chloro-4-fluorobenzoate

Ref: 3D-CKC71731

2-(3-Acetylphenyl)-4-methyl-1,2-thiazolidine-1,1-dione

Ref: 3D-CKC73171

2-[(1,1,1-Trifluoropropan-2-yl)oxy]pyridine-3-carboxylic acid

Ref: 3D-CKC73285

2-(3-Chlorophenyl)-4,4,4-trifluorobutanoic acid

Ref: 3D-CKC75886

2-N-Methyl-2-N-[(4-methylphenyl)methyl]-1,3-benzoxazole-2,5-diamine

Ref: 3D-CKC76800

Furan-2-yl(1H-imidazol-2-yl)methanol

Ref: 3D-CKC76859

3-Bromo-8-chloroimidazo[1,5-a]pyrazine

Ref: 3D-CKC77660

Methyl 2-((2,2,2-trifluoroethyl)amino)propanoate

Ref: 3D-CKC81968

Methyl 2-bromo-5-chloro-4-fluorobenzoate

Ref: 3D-CKC83528

3-(4-Methylpyridin-3-yl)propanal

Ref: 3D-CKC95802

2-(6-Methoxy-1-methyl-1H-1,3-benzodiazol-2-yl)ethan-1-ol

Ref: 3D-CKC97679

Methyl 2,2-dimethyl-3-(propylsulfanyl)propanoate

Ref: 3D-CKC98210

5-Bromo-1H-pyrazole-4-carboxylic acid

Ref: 3D-CKC98645

6-{[(9H-Fluoren-9-yl)methoxy]carbonyl}-6-azaspiro[3.4]octane-8-carboxylic acid

Ref: 3D-CKD01232

2-{[(9H-Fluoren-9-yl)methoxy]carbonyl}-1H,2H,3H,4H,5H-pyrido[4,3-b]indole-6-carboxylic acid

Ref: 3D-CKD01269

Methyl 2-ao-3-methylpentanoate hydrochloride

Ref: 3D-CKD17524

1-{[(9H-Fluoren-9-yl)methoxy]carbonyl}-3-(methoxymethyl)piperidine-3-carboxylic acid

Ref: 3D-CKD24079

2-Cyano-N-{4-[(difluoromethyl)sulfanyl]phenyl}acetamide

Ref: 3D-CRA48052

1-(3,5-dichloropyridin-4-yl)ethan-1-one

Ref: 3D-CRA56166

Methyl 5-[(3-chlorophenoxy)methyl]-2-furoate

Ref: 3D-CRA60196

5-(4-Propyl-phenoxymethyl)-furan-2-carboxylic acid methyl ester

Ref: 3D-CRA60298

5-[(4-Chloro-5-methyl-3-nitro-1H-pyrazol-1-yl)methyl]furan-2-carboxylic acid

Ref: 3D-CRA61416

5-(3,4-Dimethyl-phenoxymethyl)-furan-2-carboxylic acid methyl ester

Ref: 3D-CRA61464

5-(3,5-Dimethyl-4-nitro-pyrazol-1-ylmethyl)-furan-2-carboxylic acid methyl ester

Ref: 3D-CRA61700

3-[(4-Chloro-3-nitro-1H-pyrazol-1-yl)methyl]benzoic acid

Ref: 3D-CRA72000

4-[(3-Nitro-1H-1,2,4-triazol-1-yl)methyl]benzoic acid

Ref: 3D-CRA72088

5-(Pentafluorophenoxymethyl)furan-2-carboxylic acid

Ref: 3D-CRA72783

3-[(3-Nitro-1H-pyrazol-1-yl)methyl]benzoic acid