Organic zwitterions
- (1)
- (2)
- (36)
- (1)
- (15)
- (1)
- (27)
- (4)
- (1)
- (3)
- (2)
- (6)
- (2)
- (1)
- (58)
- (3)
- (1)
- (10)
- (1)
- (8)
- (1)
- (54)
- (1)
- (2)
- (14)
- (23)
- (3)
- (1)
- (3)
- (1)
- (1)
- (2)
- (4)
- (1)
- (2)
- (1)
- (2)
- (6)
- (3)
- (5)
- (14)
- (1)
- (4)
- (11)
- (8)
- (3)
- (9)
- (16)
- (1)
- (5)
- (9)
- (2)
- (6)
- (2)
- (15)
- (4)
- (7)
- (2)
- (1)
- (2)
- (5)
- (1)
- (1)
- (4)
- (4)
- (2)
- (1)
- (4)
- (3)
- (10)
- (2)
- (2)
- (2)
- (2)
- (4)
- (2)
- (2)
- (1)
- (5)
- (2)
- (1)
- (2)
- (2)
- (3)
- (2)
- (1)
- (1)
- (1)
- (4)
- (8)
- (6)
- (4)
- (2)
- (1)
- (3)
- (4)
- (2)
- (2)
- (2)
- (3)
- (5)
- (3)
- (2)
- (1)
- (5)
- (3)
- (1)
- (2)
- (2)
- (2)
- (1)
- (1)
- (1)
- (2)
- (2)
- (7)
- (37)
- (1)
- (2)
- (4)
- (2)
- (1)
- (2)
- (8)
- (1)
- (3)
- (3)
- (3)
- (2)
- (20)
- (37)
- (62)
- (4)
- (9)
- (2)
- (4)
- (5)
- (3)
- (6)
- (2)
- (2)
- (2)
- (4)
- (6)
- (77)
- (3)
- (1)
- (1)
- (4)
- (45)
- (2)
- (1)
- (14)
- (2)
- (3)
- (1)
- (2)
- (3)
- (3)
- (3)
- (1)
- (3)
- (2)
- (2)
- (5)
- (4)
- (2)
- (2)
- (3)
- (2)
- (3)
- (2)
- (1)
- (3)
- (2)
- (12)
- (1)
- (4)
- (1)
- (3)
- (3)
- (4)
- (3)
- (2)
- (3)
- (1)
- (2)
- (2)
- (2)
- (3)
Filtered Search Results
6-Nitro-2(3H)-benzoxazolone, 98%
CAS: 4694-91-1 Molecular Formula: C7H4N2O4 Molecular Weight (g/mol): 180.119 MDL Number: MFCD00463755 InChI Key: JGYJZHYTADCWIK-UHFFFAOYSA-N Synonym: 6-nitrobenzo d oxazol-2 3h-one,6-nitro-2-benzoxazolinone,2 3h-benzoxazolone, 6-nitro,6-nitrobenzoxazolinone,6-nitro benzoxazolinone,6-nitro-3h-benzooxazol-2-one,6-nitrobenzoxazol-2 3h-one,6-nitrobenzoxazolone,6-nitrobenzoxazole-2 3h-one,6-nitro-1,3-benzoxazol-2 3h-one PubChem CID: 78419 IUPAC Name: 6-nitro-3H-1,3-benzoxazol-2-one SMILES: C1=CC2=C(C=C1[N+](=O)[O-])OC(=O)N2
| PubChem CID | 78419 |
|---|---|
| CAS | 4694-91-1 |
| Molecular Weight (g/mol) | 180.119 |
| MDL Number | MFCD00463755 |
| SMILES | C1=CC2=C(C=C1[N+](=O)[O-])OC(=O)N2 |
| Synonym | 6-nitrobenzo d oxazol-2 3h-one,6-nitro-2-benzoxazolinone,2 3h-benzoxazolone, 6-nitro,6-nitrobenzoxazolinone,6-nitro benzoxazolinone,6-nitro-3h-benzooxazol-2-one,6-nitrobenzoxazol-2 3h-one,6-nitrobenzoxazolone,6-nitrobenzoxazole-2 3h-one,6-nitro-1,3-benzoxazol-2 3h-one |
| IUPAC Name | 6-nitro-3H-1,3-benzoxazol-2-one |
| InChI Key | JGYJZHYTADCWIK-UHFFFAOYSA-N |
| Molecular Formula | C7H4N2O4 |
2-Chloro-4-nitroaniline, 98+%
CAS: 121-87-9 Molecular Formula: C6H5ClN2O2 Molecular Weight (g/mol): 172.568 MDL Number: MFCD00007665 InChI Key: LOCWBQIWHWIRGN-UHFFFAOYSA-N Synonym: ocpna,2-chloro-4-nitrobenzenamine,o-chloro-p-nitroaniline,4-nitro-2-chloroaniline,benzenamine, 2-chloro-4-nitro,1-amino-2-chloro-4-nitrobenzene,aniline, 2-chloro-4-nitro,unii-xsa3zx337b,2-chloro-4-nitro-phenylamine,ortho-chloro-para-nitroaniline PubChem CID: 8492 IUPAC Name: 2-chloro-4-nitroaniline SMILES: C1=CC(=C(C=C1[N+](=O)[O-])Cl)N
| PubChem CID | 8492 |
|---|---|
| CAS | 121-87-9 |
| Molecular Weight (g/mol) | 172.568 |
| MDL Number | MFCD00007665 |
| SMILES | C1=CC(=C(C=C1[N+](=O)[O-])Cl)N |
| Synonym | ocpna,2-chloro-4-nitrobenzenamine,o-chloro-p-nitroaniline,4-nitro-2-chloroaniline,benzenamine, 2-chloro-4-nitro,1-amino-2-chloro-4-nitrobenzene,aniline, 2-chloro-4-nitro,unii-xsa3zx337b,2-chloro-4-nitro-phenylamine,ortho-chloro-para-nitroaniline |
| IUPAC Name | 2-chloro-4-nitroaniline |
| InChI Key | LOCWBQIWHWIRGN-UHFFFAOYSA-N |
| Molecular Formula | C6H5ClN2O2 |
Titanium(IV) ethoxide, 33-35% TiO2
CAS: 3087-36-3 Molecular Formula: C8H20O4Ti Molecular Weight (g/mol): 228.15 InChI Key: JMXKSZRRTHPKDL-UHFFFAOYSA-N Synonym: titanium iv ethoxide,ethyl titanate,titanium tetraethoxide,titanium ethoxide,tetraethyl titanate,titanium iv ethanolate,titanium 4+ tetraethanolate,titanium 4+ ethanolate PubChem CID: 76524 IUPAC Name: ethanolate;titanium(4+) SMILES: CC[O-].CC[O-].CC[O-].CC[O-].[Ti+4]
| PubChem CID | 76524 |
|---|---|
| CAS | 3087-36-3 |
| Molecular Weight (g/mol) | 228.15 |
| SMILES | CC[O-].CC[O-].CC[O-].CC[O-].[Ti+4] |
| Synonym | titanium iv ethoxide,ethyl titanate,titanium tetraethoxide,titanium ethoxide,tetraethyl titanate,titanium iv ethanolate,titanium 4+ tetraethanolate,titanium 4+ ethanolate |
| IUPAC Name | ethanolate;titanium(4+) |
| InChI Key | JMXKSZRRTHPKDL-UHFFFAOYSA-N |
| Molecular Formula | C8H20O4Ti |
3-Chloro-4-nitroaniline, 95%
CAS: 825-41-2 Molecular Formula: C6H5ClN2O2 Molecular Weight (g/mol): 172.568 MDL Number: MFCD00085922 InChI Key: LDSIOPGMLLPSSR-UHFFFAOYSA-N Synonym: benzenamine, 3-chloro-4-nitro,aniline, 3-chloro-4-nitro,3-chlor-4-nitroanilin,3-chloro-4-nitrobenzenamine,zlchem 908,pubchem9594,acmc-209ppd,2-chloro-4-aminonitrobenzene,4-amino-2-chloronitrobenzene,3-chloro-4-nitro-phenylamine PubChem CID: 69996 IUPAC Name: 3-chloro-4-nitroaniline SMILES: C1=CC(=C(C=C1N)Cl)[N+](=O)[O-]
| PubChem CID | 69996 |
|---|---|
| CAS | 825-41-2 |
| Molecular Weight (g/mol) | 172.568 |
| MDL Number | MFCD00085922 |
| SMILES | C1=CC(=C(C=C1N)Cl)[N+](=O)[O-] |
| Synonym | benzenamine, 3-chloro-4-nitro,aniline, 3-chloro-4-nitro,3-chlor-4-nitroanilin,3-chloro-4-nitrobenzenamine,zlchem 908,pubchem9594,acmc-209ppd,2-chloro-4-aminonitrobenzene,4-amino-2-chloronitrobenzene,3-chloro-4-nitro-phenylamine |
| IUPAC Name | 3-chloro-4-nitroaniline |
| InChI Key | LDSIOPGMLLPSSR-UHFFFAOYSA-N |
| Molecular Formula | C6H5ClN2O2 |
4-Nitrophenethyl alcohol, 99%
CAS: 100-27-6 Molecular Formula: C8H9NO3 Molecular Weight (g/mol): 167.16 InChI Key: IKMXRUOZUUKSON-UHFFFAOYSA-N Synonym: 4-nitrophenethyl alcohol,2-4-nitrophenyl ethanol,4-nitrobenzeneethanol,2-p-nitrophenyl ethanol,benzeneethanol, 4-nitro,p-nitrophenethyl alcohol,2-4-nitrophenyl ethan-1-ol,phenethyl alcohol, p-nitro,ccris 6079,4-nitrophenethylalcohol PubChem CID: 7494 IUPAC Name: 2-(4-nitrophenyl)ethanol SMILES: C1=CC(=CC=C1CCO)[N+](=O)[O-]
| PubChem CID | 7494 |
|---|---|
| CAS | 100-27-6 |
| Molecular Weight (g/mol) | 167.16 |
| SMILES | C1=CC(=CC=C1CCO)[N+](=O)[O-] |
| Synonym | 4-nitrophenethyl alcohol,2-4-nitrophenyl ethanol,4-nitrobenzeneethanol,2-p-nitrophenyl ethanol,benzeneethanol, 4-nitro,p-nitrophenethyl alcohol,2-4-nitrophenyl ethan-1-ol,phenethyl alcohol, p-nitro,ccris 6079,4-nitrophenethylalcohol |
| IUPAC Name | 2-(4-nitrophenyl)ethanol |
| InChI Key | IKMXRUOZUUKSON-UHFFFAOYSA-N |
| Molecular Formula | C8H9NO3 |
Iron(II) methoxide, 98%
CAS: 7245-21-8 Molecular Formula: C2H6FeO2 Molecular Weight (g/mol): 117.913 MDL Number: MFCD00061474 InChI Key: VAPRHKOWFRYFTF-UHFFFAOYSA-N Synonym: iron ii methoxide,iron 2+ dimethoxide,methanol, iron 2+ salt,acmc-1bc40 PubChem CID: 14598007 IUPAC Name: iron(2+);methanolate SMILES: C[O-].C[O-].[Fe+2]
| PubChem CID | 14598007 |
|---|---|
| CAS | 7245-21-8 |
| Molecular Weight (g/mol) | 117.913 |
| MDL Number | MFCD00061474 |
| SMILES | C[O-].C[O-].[Fe+2] |
| Synonym | iron ii methoxide,iron 2+ dimethoxide,methanol, iron 2+ salt,acmc-1bc40 |
| IUPAC Name | iron(2+);methanolate |
| InChI Key | VAPRHKOWFRYFTF-UHFFFAOYSA-N |
| Molecular Formula | C2H6FeO2 |
2,6-Dichloro-4-nitroaniline, 95%
CAS: 99-30-9 Molecular Formula: C6H4Cl2N2O2 Molecular Weight (g/mol): 207.01 MDL Number: MFCD00007677 InChI Key: BIXZHMJUSMUDOQ-UHFFFAOYSA-N Synonym: dichloran,dicloran,allisan,botran,dcna,ditranil,batran,bortran,resisan,dcna fungicide PubChem CID: 7430 ChEBI: CHEBI:27864 IUPAC Name: 2,6-dichloro-4-nitroaniline SMILES: C1=C(C=C(C(=C1Cl)N)Cl)[N+](=O)[O-]
| PubChem CID | 7430 |
|---|---|
| CAS | 99-30-9 |
| Molecular Weight (g/mol) | 207.01 |
| ChEBI | CHEBI:27864 |
| MDL Number | MFCD00007677 |
| SMILES | C1=C(C=C(C(=C1Cl)N)Cl)[N+](=O)[O-] |
| Synonym | dichloran,dicloran,allisan,botran,dcna,ditranil,batran,bortran,resisan,dcna fungicide |
| IUPAC Name | 2,6-dichloro-4-nitroaniline |
| InChI Key | BIXZHMJUSMUDOQ-UHFFFAOYSA-N |
| Molecular Formula | C6H4Cl2N2O2 |
Tantalum(V) methoxide
CAS: 865-35-0 Molecular Formula: C5H15O5Ta Molecular Weight (g/mol): 336.118 MDL Number: MFCD00058817 InChI Key: QASMZJKUEABJNR-UHFFFAOYSA-N PubChem CID: 12787641 IUPAC Name: methanolate;tantalum(5+) SMILES: C[O-].C[O-].C[O-].C[O-].C[O-].[Ta+5]
| PubChem CID | 12787641 |
|---|---|
| CAS | 865-35-0 |
| Molecular Weight (g/mol) | 336.118 |
| MDL Number | MFCD00058817 |
| SMILES | C[O-].C[O-].C[O-].C[O-].C[O-].[Ta+5] |
| IUPAC Name | methanolate;tantalum(5+) |
| InChI Key | QASMZJKUEABJNR-UHFFFAOYSA-N |
| Molecular Formula | C5H15O5Ta |
4,5-Difluoro-2-nitroaniline, 98%
CAS: 78056-39-0 Molecular Formula: C6H4F2N2O2 Molecular Weight (g/mol): 174.11 MDL Number: MFCD00010876 InChI Key: WDMCABATCGQAKK-UHFFFAOYSA-N Synonym: 3,4-difluoro-6-nitroaniline,benzenamine, 4,5-difluoro-2-nitro,4,5-difluoro-2-nitro-aniline,4,5-difluoro-2-nitrophenylamine,2-nitro-4,5-difluoroaniline,2-amino-4,5-difluoronitrobenzene,4,5-difluoro-2-nitro-phenylamine,4,5-difluoro-2-nitrobenzenamine,pubchem2121,acmc-209pdb PubChem CID: 157151 IUPAC Name: 4,5-difluoro-2-nitroaniline SMILES: NC1=CC(F)=C(F)C=C1[N+]([O-])=O
| PubChem CID | 157151 |
|---|---|
| CAS | 78056-39-0 |
| Molecular Weight (g/mol) | 174.11 |
| MDL Number | MFCD00010876 |
| SMILES | NC1=CC(F)=C(F)C=C1[N+]([O-])=O |
| Synonym | 3,4-difluoro-6-nitroaniline,benzenamine, 4,5-difluoro-2-nitro,4,5-difluoro-2-nitro-aniline,4,5-difluoro-2-nitrophenylamine,2-nitro-4,5-difluoroaniline,2-amino-4,5-difluoronitrobenzene,4,5-difluoro-2-nitro-phenylamine,4,5-difluoro-2-nitrobenzenamine,pubchem2121,acmc-209pdb |
| IUPAC Name | 4,5-difluoro-2-nitroaniline |
| InChI Key | WDMCABATCGQAKK-UHFFFAOYSA-N |
| Molecular Formula | C6H4F2N2O2 |
4-Fluoro-5-nitrobenzene-1,2-diamine, Technical Grade, Thermo Scientific™
CAS: 113269-06-0 Molecular Formula: C6H6FN3O2 Molecular Weight (g/mol): 171.131 InChI Key: QZNALIMEKAACKP-UHFFFAOYSA-N PubChem CID: 3782733 IUPAC Name: 4-fluoro-5-nitrobenzene-1,2-diamine SMILES: C1=C(C(=CC(=C1[N+](=O)[O-])F)N)N
| PubChem CID | 3782733 |
|---|---|
| CAS | 113269-06-0 |
| Molecular Weight (g/mol) | 171.131 |
| SMILES | C1=C(C(=CC(=C1[N+](=O)[O-])F)N)N |
| IUPAC Name | 4-fluoro-5-nitrobenzene-1,2-diamine |
| InChI Key | QZNALIMEKAACKP-UHFFFAOYSA-N |
| Molecular Formula | C6H6FN3O2 |
2-Nitroethanol, tech. 80%
CAS: 625-48-9 Molecular Formula: C2H5NO3 Molecular Weight (g/mol): 91.066 MDL Number: MFCD00007405 InChI Key: KIPMDPDAFINLIV-UHFFFAOYSA-N Synonym: ethanol, 2-nitro,2-nitroethan-1-ol,beta-nitroalcohol,beta-nitroethanol,2-nitro-ethanol,.beta.-nitroethanol,ccris 6076,2 nitroethanol,pubchem14208,2-nitroethanol PubChem CID: 12252 IUPAC Name: 2-nitroethanol SMILES: C(CO)[N+](=O)[O-]
| PubChem CID | 12252 |
|---|---|
| CAS | 625-48-9 |
| Molecular Weight (g/mol) | 91.066 |
| MDL Number | MFCD00007405 |
| SMILES | C(CO)[N+](=O)[O-] |
| Synonym | ethanol, 2-nitro,2-nitroethan-1-ol,beta-nitroalcohol,beta-nitroethanol,2-nitro-ethanol,.beta.-nitroethanol,ccris 6076,2 nitroethanol,pubchem14208,2-nitroethanol |
| IUPAC Name | 2-nitroethanol |
| InChI Key | KIPMDPDAFINLIV-UHFFFAOYSA-N |
| Molecular Formula | C2H5NO3 |
5-Chloro-2-nitroaniline, 97%
CAS: 1635-61-6 Molecular Formula: C6H5ClN2O2 Molecular Weight (g/mol): 172.57 MDL Number: MFCD00007776 InChI Key: ZCWXYZBQDNFULS-UHFFFAOYSA-N Synonym: 2-nitro-5-chloroaniline,benzenamine, 5-chloro-2-nitro,3-chloro-6-nitroaniline,5-chloro-2-nitrobenzeneamine,aniline, 5-chloro-2-nitro,2-amino-4-chloro-nitrobenzene,unii-656xjm4con,5-chloro-2-nitrobenzenamine,ccris 8934,5-chloro-2-nitro aniline PubChem CID: 74218 IUPAC Name: 5-chloro-2-nitroaniline SMILES: C1=CC(=C(C=C1Cl)N)[N+](=O)[O-]
| PubChem CID | 74218 |
|---|---|
| CAS | 1635-61-6 |
| Molecular Weight (g/mol) | 172.57 |
| MDL Number | MFCD00007776 |
| SMILES | C1=CC(=C(C=C1Cl)N)[N+](=O)[O-] |
| Synonym | 2-nitro-5-chloroaniline,benzenamine, 5-chloro-2-nitro,3-chloro-6-nitroaniline,5-chloro-2-nitrobenzeneamine,aniline, 5-chloro-2-nitro,2-amino-4-chloro-nitrobenzene,unii-656xjm4con,5-chloro-2-nitrobenzenamine,ccris 8934,5-chloro-2-nitro aniline |
| IUPAC Name | 5-chloro-2-nitroaniline |
| InChI Key | ZCWXYZBQDNFULS-UHFFFAOYSA-N |
| Molecular Formula | C6H5ClN2O2 |
2-Nitro-2-methyl-1,3-propanediol, 99%, Thermo Scientific Chemicals
CAS: 77-49-6 Molecular Formula: C4H9NO4 Molecular Weight (g/mol): 135.12 MDL Number: MFCD00024812 InChI Key: LOTYADDQWWVBDJ-UHFFFAOYSA-N Synonym: 2-methyl-2-nitro-1,3-propanediol,nmpd,2-nitro-2-methyl-1,3-propanediol,nitroisobutylglycol,1,3-propanediol, 2-methyl-2-nitro,2-methyl-2-nitropropanediol,1,1-dimethylol-1-nitroethane,caswell no. 573n,epa pesticide chemical code 573900,acmc-1basy PubChem CID: 6480 IUPAC Name: 2-methyl-2-nitropropane-1,3-diol SMILES: CC(CO)(CO)[N+]([O-])=O
| PubChem CID | 6480 |
|---|---|
| CAS | 77-49-6 |
| Molecular Weight (g/mol) | 135.12 |
| MDL Number | MFCD00024812 |
| SMILES | CC(CO)(CO)[N+]([O-])=O |
| Synonym | 2-methyl-2-nitro-1,3-propanediol,nmpd,2-nitro-2-methyl-1,3-propanediol,nitroisobutylglycol,1,3-propanediol, 2-methyl-2-nitro,2-methyl-2-nitropropanediol,1,1-dimethylol-1-nitroethane,caswell no. 573n,epa pesticide chemical code 573900,acmc-1basy |
| IUPAC Name | 2-methyl-2-nitropropane-1,3-diol |
| InChI Key | LOTYADDQWWVBDJ-UHFFFAOYSA-N |
| Molecular Formula | C4H9NO4 |
3-Nitro-o-phenylenediamine, 98%
CAS: 3694-52-8 Molecular Formula: C6H7N3O2 Molecular Weight (g/mol): 153.14 MDL Number: MFCD00007722 InChI Key: IOCXBXZBNOYTLQ-UHFFFAOYSA-N Synonym: 3-nitro-1,2-phenylenediamine,3-nitro-o-phenylenediamine,1,2-diamino-3-nitrobenzene,3-nitrophenylenediamine,2-amino-6-nitroaniline,1,2-benzenediamine, 3-nitro,3-nitro-1,2-benzenediamine,o-phenylenediamine, 3-nitro,unii-wrz63l50zk,ccris 5427 PubChem CID: 4359525 IUPAC Name: 3-nitrobenzene-1,2-diamine SMILES: C1=CC(=C(C(=C1)[N+](=O)[O-])N)N
| PubChem CID | 4359525 |
|---|---|
| CAS | 3694-52-8 |
| Molecular Weight (g/mol) | 153.14 |
| MDL Number | MFCD00007722 |
| SMILES | C1=CC(=C(C(=C1)[N+](=O)[O-])N)N |
| Synonym | 3-nitro-1,2-phenylenediamine,3-nitro-o-phenylenediamine,1,2-diamino-3-nitrobenzene,3-nitrophenylenediamine,2-amino-6-nitroaniline,1,2-benzenediamine, 3-nitro,3-nitro-1,2-benzenediamine,o-phenylenediamine, 3-nitro,unii-wrz63l50zk,ccris 5427 |
| IUPAC Name | 3-nitrobenzene-1,2-diamine |
| InChI Key | IOCXBXZBNOYTLQ-UHFFFAOYSA-N |
| Molecular Formula | C6H7N3O2 |
6-Nitrobenzoxazole-2(3H)-one, 97%, Thermo Scientific Chemicals
CAS: 4694-91-1 Molecular Formula: C7H4N2O4 Molecular Weight (g/mol): 180.12 MDL Number: MFCD00463755 InChI Key: JGYJZHYTADCWIK-UHFFFAOYSA-N Synonym: 6-nitrobenzo d oxazol-2 3h-one,6-nitro-2-benzoxazolinone,2 3h-benzoxazolone, 6-nitro,6-nitrobenzoxazolinone,6-nitro benzoxazolinone,6-nitro-3h-benzooxazol-2-one,6-nitrobenzoxazol-2 3h-one,6-nitrobenzoxazolone,6-nitrobenzoxazole-2 3h-one,6-nitro-1,3-benzoxazol-2 3h-one PubChem CID: 78419 IUPAC Name: 6-nitro-3H-1,3-benzoxazol-2-one SMILES: C1=CC2=C(C=C1[N+](=O)[O-])OC(=O)N2
| PubChem CID | 78419 |
|---|---|
| CAS | 4694-91-1 |
| Molecular Weight (g/mol) | 180.12 |
| MDL Number | MFCD00463755 |
| SMILES | C1=CC2=C(C=C1[N+](=O)[O-])OC(=O)N2 |
| Synonym | 6-nitrobenzo d oxazol-2 3h-one,6-nitro-2-benzoxazolinone,2 3h-benzoxazolone, 6-nitro,6-nitrobenzoxazolinone,6-nitro benzoxazolinone,6-nitro-3h-benzooxazol-2-one,6-nitrobenzoxazol-2 3h-one,6-nitrobenzoxazolone,6-nitrobenzoxazole-2 3h-one,6-nitro-1,3-benzoxazol-2 3h-one |
| IUPAC Name | 6-nitro-3H-1,3-benzoxazol-2-one |
| InChI Key | JGYJZHYTADCWIK-UHFFFAOYSA-N |
| Molecular Formula | C7H4N2O4 |