Molecular formula
C21H21N3O2S
213 compounds have this formula on CompoundList.
- Molar mass
- 379.48g/mol
- Monoisotopic mass
- 379.1354Da
- Atoms
- 48
- Elements
- 5
- Rings plus double bonds
- 13
The formula C21H21N3O2S describes a molecule made of 21 carbon atoms, 21 hydrogen atoms, 3 nitrogen atoms, 2 oxygen atoms and 1 sulfur atom. It is written in Hill notation: carbon first, then hydrogen, then the other elements in alphabetical order. The formula tells you which atoms are present, not how they are connected, which is why several different chemicals can share it.
Elemental composition
- C Carbon × 2166.47%12.011 × 21 = 252.231 g/mol
- H Hydrogen × 215.58%1.008 × 21 = 21.168 g/mol
- N Nitrogen × 311.07%14.007 × 3 = 42.021 g/mol
- O Oxygen × 28.43%15.999 × 2 = 31.998 g/mol
- S Sulfur × 18.45%32.06 × 1 = 32.060 g/mol
Look up another formula
Compounds with the formula C21H21N3O2S
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 100 of 213 compounds
Azd-1208
CAS 1204144-28-4C21H21N3O2S
2-Methyl-N-(4-methyl-2-pyridinyl)-5-oxo-4-(2-thienyl)-1,4,5,6,7,8-hexahydro-3-quinolinecarboxamide
CAS 362487-51-2C21H21N3O2S
![2-[(5-Benzyl-4-hydroxy-6-methylpyrimidin-2-yl)thio]-N-(3-methylphenyl)acetamide chemical structure, C21H21N3O2S, CAS 865429-04-5](/s/HUUMGBZXHVCXLQ-UHFFFAOYSA-N.svg)
2-[(5-Benzyl-4-hydroxy-6-methylpyrimidin-2-yl)thio]-N-(3-methylphenyl)acetamide
CAS 865429-04-5C21H21N3O2S
![N-[4-(Morpholin-4-yl)phenyl]-2-(quinolin-2-ylsulfanyl)acetamide chemical structure, C21H21N3O2S, CAS 561009-79-8](/s/LDOMMSRKRUYNGS-UHFFFAOYSA-N.svg)
N-[4-(Morpholin-4-yl)phenyl]-2-(quinolin-2-ylsulfanyl)acetamide
CAS 561009-79-8C21H21N3O2S
![3-Amino-N-benzyl-7,7-dimethyl-5-oxo-5,6,7,8-tetrahydrothieno[2,3-b]quinoline-2-carboxamide chemical structure, C21H21N3O2S, CAS 442557-70-2](/s/JFGBOZGTDOPJMV-UHFFFAOYSA-N.svg)
3-Amino-N-benzyl-7,7-dimethyl-5-oxo-5,6,7,8-tetrahydrothieno[2,3-b]quinoline-2-carboxamide
CAS 442557-70-2C21H21N3O2S
3-Propyl-7-(1,2,3,4-tetrahydroisoquinoline-2-carbonyl)-2-thioxo-2,3-dihydroquinazolin-4(1H)-one
CAS 403727-90-2C21H21N3O2S
![2-{[2-Oxo-2-(piperidin-1-yl)ethyl]sulfanyl}-3-phenyl-3,4-dihydroquinazolin-4-one chemical structure, C21H21N3O2S, CAS 312522-38-6](/s/IXGUBPVWHLQGIE-UHFFFAOYSA-N.svg)
2-{[2-Oxo-2-(piperidin-1-yl)ethyl]sulfanyl}-3-phenyl-3,4-dihydroquinazolin-4-one
CAS 312522-38-6C21H21N3O2S
1-(3,4-Dihydroquinolin-1(2H)-yl)-2-((1-(3-methoxyphenyl)-1H-imidazol-2-yl)thio)ethanone
CAS 688335-57-1C21H21N3O2S
2-Methyl-N-(6-methyl-2-pyridinyl)-5-oxo-4-(2-thienyl)-1,4,5,6,7,8-hexahydro-3-quinolinecarboxamide
CAS 362487-45-4C21H21N3O2S
![4-[2-(4-Benzoyl-1-piperazinyl)-1,3-thiazol-4-yl]phenyl methyl ether chemical structure, C21H21N3O2S, CAS 302905-01-7](/s/HXJLQFPFMYJEFO-UHFFFAOYSA-N.svg)
4-[2-(4-Benzoyl-1-piperazinyl)-1,3-thiazol-4-yl]phenyl methyl ether
CAS 302905-01-7C21H21N3O2S
2-Phenyl-5-(phenylsulfonyl)-4-piperidinopyrimidine
CAS 339106-33-1C21H21N3O2S
![4-{6-[(3-Methoxyphenyl)sulfanyl]-2-phenyl-4-pyrimidinyl}morpholine chemical structure, C21H21N3O2S, CAS 339019-30-6](/s/CXYOAMSUWCRZNA-UHFFFAOYSA-N.svg)
4-{6-[(3-Methoxyphenyl)sulfanyl]-2-phenyl-4-pyrimidinyl}morpholine
CAS 339019-30-6C21H21N3O2S
2-((6-(2-Methoxyphenyl)pyridazin-3-yl)thio)-N-phenethylacetamide
CAS 893979-94-7C21H21N3O2S
2-((6-(3-Methoxyphenyl)pyridazin-3-yl)thio)-N-phenethylacetamide
CAS 893988-37-9C21H21N3O2S
![2-(4-Methoxyphenyl)-N-(2-(p-tolyl)-4,6-dihydro-2H-thieno[3,4-c]pyrazol-3-yl)acetamide chemical structure, C21H21N3O2S, CAS 396724-43-9](/s/WZQOSWQZQPIUPC-UHFFFAOYSA-N.svg)
2-(4-Methoxyphenyl)-N-(2-(p-tolyl)-4,6-dihydro-2H-thieno[3,4-c]pyrazol-3-yl)acetamide
CAS 396724-43-9C21H21N3O2S
(Z)-5-(2-Methoxybenzylidene)-2-(4-phenylpiperazin-1-yl)thiazol-4(5H)-one
CAS 848208-68-4C21H21N3O2S
![N-[2-(4-Methoxyphenyl)-4,6-dihydrothieno[3,4-c]pyrazol-3-yl]-3,4-dimethylbenzamide chemical structure, C21H21N3O2S, CAS 392255-95-7](/s/WWMKDEPNPZBFRN-UHFFFAOYSA-N.svg)
N-[2-(4-Methoxyphenyl)-4,6-dihydrothieno[3,4-c]pyrazol-3-yl]-3,4-dimethylbenzamide
CAS 392255-95-7C21H21N3O2S
![N-(2-(2,4-Dimethylphenyl)-4,6-dihydro-2H-thieno[3,4-c]pyrazol-3-yl)-4-methoxybenzamide chemical structure, C21H21N3O2S, CAS 361172-07-8](/s/GSLWDGYKJRZXJQ-UHFFFAOYSA-N.svg)
N-(2-(2,4-Dimethylphenyl)-4,6-dihydro-2H-thieno[3,4-c]pyrazol-3-yl)-4-methoxybenzamide
CAS 361172-07-8C21H21N3O2S
![N-(2-(2,4-Dimethylphenyl)-4,6-dihydro-2H-thieno[3,4-c]pyrazol-3-yl)-3-methoxybenzamide chemical structure, C21H21N3O2S, CAS 361172-03-4](/s/DMGMGBGRDCYUCT-UHFFFAOYSA-N.svg)
N-(2-(2,4-Dimethylphenyl)-4,6-dihydro-2H-thieno[3,4-c]pyrazol-3-yl)-3-methoxybenzamide
CAS 361172-03-4C21H21N3O2S
![N-(2-(2,3-Dimethylphenyl)-4,6-dihydro-2H-thieno[3,4-c]pyrazol-3-yl)-4-methoxybenzamide chemical structure, C21H21N3O2S, CAS 450344-00-0](/s/LOPGCBLYHTUWMP-UHFFFAOYSA-N.svg)
N-(2-(2,3-Dimethylphenyl)-4,6-dihydro-2H-thieno[3,4-c]pyrazol-3-yl)-4-methoxybenzamide
CAS 450344-00-0C21H21N3O2S
![N-(2-(2,3-Dimethylphenyl)-4,6-dihydro-2H-thieno[3,4-c]pyrazol-3-yl)-3-methoxybenzamide chemical structure, C21H21N3O2S, CAS 450343-99-4](/s/VWKFJVGEGKDMKO-UHFFFAOYSA-N.svg)
N-(2-(2,3-Dimethylphenyl)-4,6-dihydro-2H-thieno[3,4-c]pyrazol-3-yl)-3-methoxybenzamide
CAS 450343-99-4C21H21N3O2S
![2-Ethoxy-N-(2-(p-tolyl)-4,6-dihydro-2H-thieno[3,4-c]pyrazol-3-yl)benzamide chemical structure, C21H21N3O2S, CAS 476458-78-3](/s/RKRPVAOJNBWXRR-UHFFFAOYSA-N.svg)
2-Ethoxy-N-(2-(p-tolyl)-4,6-dihydro-2H-thieno[3,4-c]pyrazol-3-yl)benzamide
CAS 476458-78-3C21H21N3O2S
![N-(2-(2,3-Dimethylphenyl)-4,6-dihydro-2H-thieno[3,4-c]pyrazol-3-yl)-2-phenoxyacetamide chemical structure, C21H21N3O2S, CAS 450344-38-4](/s/XPKNLJVZAIHAFU-UHFFFAOYSA-N.svg)
N-(2-(2,3-Dimethylphenyl)-4,6-dihydro-2H-thieno[3,4-c]pyrazol-3-yl)-2-phenoxyacetamide
CAS 450344-38-4C21H21N3O2S
![4-Ethoxy-N-[2-(2-methylphenyl)-4,6-dihydrothieno[3,4-c]pyrazol-3-yl]benzamide chemical structure, C21H21N3O2S, CAS 396720-79-9](/s/VTIGYTATBUBVGG-UHFFFAOYSA-N.svg)
4-Ethoxy-N-[2-(2-methylphenyl)-4,6-dihydrothieno[3,4-c]pyrazol-3-yl]benzamide
CAS 396720-79-9C21H21N3O2S
- 4-Ethoxy-N-(2-(p-tolyl)-4,6-dihydro-2H-thieno[3,4-c]pyrazol-3-yl)benzamide396720-81-3C21H21N3O2S
- N-[2-(3,5-Dimethylphenyl)-4,6-dihydrothieno[3,4-c]pyrazol-3-yl]-2-methoxybenzamide361172-00-1C21H21N3O2S
- 2-(4-Methoxyphenyl)-N-(2-(m-tolyl)-4,6-dihydro-2H-thieno[3,4-c]pyrazol-3-yl)acetamide361477-69-2C21H21N3O2S
- 2-((4,5-Diphenyl-1H-imidazol-2-yl)thio)-1-morpholinoethanone340018-57-7C21H21N3O2S
- N-(2-(2,3-Dimethylphenyl)-4,6-dihydro-2H-thieno[3,4-c]pyrazol-3-yl)-2-methoxybenzamide450343-98-3C21H21N3O2S
- N-(2-(4-Methoxyphenyl)-4,6-dihydro-2H-thieno[3,4-c]pyrazol-3-yl)-3,5-dimethylbenzamide392253-36-0C21H21N3O2S
- 4-Ethoxy-N-[2-(3-methylphenyl)-4,6-dihydrothieno[3,4-c]pyrazol-3-yl]benzamide392288-79-8C21H21N3O2S
- N-(2-(3,5-Dimethylphenyl)-4,6-dihydro-2H-thieno[3,4-c]pyrazol-3-yl)-4-methoxybenzamide361172-08-9C21H21N3O2S
- 3-Amino-N-mesityl-5-oxo-5,6,7,8-tetrahydrothieno[2,3-b]quinoline-2-carboxamide496796-46-4C21H21N3O2S
- N-(4-Methoxyphenyl)-2-(pyridin-2-ylmethylamino)-5,6-dihydro-4H-cyclopenta[b]thiophene-3-carboxamide571163-20-7C21H21N3O2S
- 2-(4-Methoxyphenyl)-N-(2-(o-tolyl)-4,6-dihydro-2H-thieno[3,4-c]pyrazol-3-yl)acetamide361172-64-7C21H21N3O2S
- (4-((4-Methoxyphenyl)amino)quinolin-2-yl)(thiomorpholino)methanone1226428-19-8C21H21N3O2S
- N-(Oxolan-2-ylmethyl)-2-(4-phenylquinazolin-2-yl)sulfanylacetamide710287-75-5C21H21N3O2S
- 2-(Benzoylamino)-4-methyl-N-(2,4,6-trimethylphenyl)-5-thiazolecarboxamide302959-43-9C21H21N3O2S
- N-(5-(Morpholinomethyl)-4-phenylthiazol-2-yl)benzamide457942-04-0C21H21N3O2S
- (E)-2-(4-Benzylpiperazin-1-yl)-5-(4-hydroxybenzylidene)thiazol-4(5H)-one1253795-53-7C21H21N3O2S
- N-[1-(1H-1,3-Benzodiazol-2-yl)-3-(methylsulfanyl)propyl]-3-methyl-1-benzofuran-2-carboxamide851453-95-7C21H21N3O2S
- N-(4-Methoxyphenethyl)-2-((6-phenylpyridazin-3-yl)thio)acetamide872688-48-7C21H21N3O2S
- N-(Benzo[d]thiazol-2-yl)-2-(4-benzylpiperidin-1-yl)-2-oxoacetamide920391-86-2C21H21N3O2S
- (E)-1-(4-((4-(Furan-2-yl)thiazol-2-yl)methyl)piperazin-1-yl)-3-phenylprop-2-en-1-one1105232-94-7C21H21N3O2S
- 2-(2-(Benzylthio)-6-oxo-1,6-dihydropyrimidin-4-yl)-N-(4-methylbenzyl)acetamide1105235-41-3C21H21N3O2S
- 2-(2-(Benzylthio)-6-oxo-1,6-dihydropyrimidin-4-yl)-N-(2-ethylphenyl)acetamide1105209-51-5C21H21N3O2S
- 2-(2-(Benzylthio)-6-oxo-1,6-dihydropyrimidin-4-yl)-N-(1-phenylethyl)acetamide1105209-35-5C21H21N3O2S
- Varamine B122093-16-7C21H21N3O2S
- 2-(2-(Benzylthio)-6-oxo-1,6-dihydropyrimidin-4-yl)-N-(2,3-dimethylphenyl)acetamide1105235-65-1C21H21N3O2S
- 2-(2-(Benzylthio)-6-oxo-1,6-dihydropyrimidin-4-yl)-N-(3,5-dimethylphenyl)acetamide1105209-67-3C21H21N3O2S
- 2-(2-(Benzylthio)-6-oxo-1,6-dihydropyrimidin-4-yl)-N-phenethylacetamide1105234-73-8C21H21N3O2S
- 4-(Benzylthio)-5-(4-morpholinyl)-2-phenyl-3(2H)-pyridazinone5273-14-3C21H21N3O2S
- 5-[(3,5-Dimethylbenzoyl)amino]-2-methyl-N-(2-methyl-1,3-thiazol-5-yl)benzamide942630-92-4C21H21N3O2S
- 3-Amino-7,7-dimethyl-N-(2-methylphenyl)-5-oxo-6,8-dihydrothieno[2,3-b]quinoline-2-carboxamide370847-69-1C21H21N3O2S
- 3-Amino-7,7-dimethyl-N-(4-methylphenyl)-5-oxo-6,8-dihydrothieno[2,3-b]quinoline-2-carboxamide370851-63-1C21H21N3O2S
- 5-Cyano-4-(furan-2-yl)-2-methyl-N-phenyl-6-(propylsulfanyl)-1,4-dihydropyridine-3-carboxamide223110-19-8C21H21N3O2S
- (Z)-N-(4-((3-Allyl-4-(4-methoxyphenyl)thiazol-2(3H)-ylidene)amino)phenyl)acetamide385403-36-1C21H21N3O2S
- (5Z)-5-[[2,5-Dimethyl-1-(4-methylphenyl)pyrrol-3-yl]methylidene]-1-prop-2-enyl-2-sulfanylidene-1,3-diazinane-4,6-dione340230-22-0C21H21N3O2S
- 1,3-Dibenzyl-2-(5-nitro-2-thienyl)imidazolidine301318-52-5C21H21N3O2S
- N-Cyclopentyl-2-{4-[4-(2-thienyl)-2-pyrimidinyl]phenoxy}acetamide477888-53-2C21H21N3O2S
- (5E)-5-[(4-Hydroxyphenyl)methylidene]-2-[4-(2-methylphenyl)piperazin-1-yl]-1,3-thiazol-4-one315241-89-5C21H21N3O2S
- N-[2-(4-Methoxyphenyl)-4,6-dihydrothieno[3,4-c]pyrazol-3-yl]-3-phenylpropanamide476458-23-8C21H21N3O2S
- N-Cyclohexyl-4-(4-oxo-2-sulfanylidene-1H-quinazolin-3-yl)benzamide443347-70-4C21H21N3O2S
- 2-(2-Naphthamido)-6-ethyl-4,5,6,7-tetrahydrothieno[2,3-c]pyridine-3-carboxamide524692-56-6C21H21N3O2S
- (6-Morpholino-2-phenyl-4-pyrimidinyl)methyl phenyl sulfoxide320421-35-0C21H21N3O2S
- 3-[4-(3-Methylpiperidine-1-carbonyl)phenyl]-2-sulfanylidene-1H-quinazolin-4-one403727-89-9C21H21N3O2S
- 4-[4-(2-Thienyl)-2-pyrimidinyl]phenyl N-cyclohexylcarbamate477862-61-6C21H21N3O2S
- 2-{[2-(3,4-Dihydroisoquinolin-2(1H)-yl)-2-oxoethyl]thio}-6-methoxy-4-methylquinazoline522652-65-9C21H21N3O2S
- N-[(4-Piperidin-1-ylphenyl)carbamothioyl]-1-benzofuran-2-carboxamide370572-75-1C21H21N3O2S
- (E)-5-(4-Hydroxybenzylidene)-2-(4-(m-tolyl)piperazin-1-yl)thiazol-4(5H)-one327082-78-0C21H21N3O2S
- N-{(E)-[3-(4-methylphenyl)-1-phenyl-1H-pyrazol-4-yl]methylidene}tetrahydrothiophen-3-amine 1,1-dioxide383903-24-0C21H21N3O2S
- 2-[(2,2-Diphenylacetyl)amino]-N,N,4-trimethyl-1,3-thiazole-5-carboxamide545437-56-7C21H21N3O2S
- N-(2-(2,4-Dimethylphenyl)-4,6-dihydro-2H-thieno[3,4-c]pyrazol-3-yl)-2-methoxybenzamide6262-03-9C21H21N3O2S
- 2-[(4-Oxo-6-propyl-1H-pyrimidin-2-yl)sulfanyl]-N-(2-phenylphenyl)acetamide351013-67-7C21H21N3O2S
- 2-Phenyl-4-((phenylsulfonyl)methyl)-6-(1-pyrrolidinyl)pyrimidine477866-98-1C21H21N3O2S
- (E)-5-(4-Hydroxybenzylidene)-2-(4-(p-tolyl)piperazin-1-yl)thiazol-4(5H)-one383893-33-2C21H21N3O2S
- N-(4-Methylphenyl)-2-(morpholin-4-yl)-4-phenyl-1,3-thiazole-5-carboxamide862391-38-6C21H21N3O2S
- N-(5-Oxido-2-phenyl-4,6-dihydro-2H-thieno[3,4-c]pyrazol-3-yl)-4-phenylbutanamide1007193-31-8C21H21N3O2S
- N-[2-(2,3-Dimethylphenyl)-5-oxo-4,6-dihydrothieno[3,4-c]pyrazol-3-yl]-4-methylbenzamide1007195-28-9C21H21N3O2S
- N-(2-Methoxy-5-methylphenyl)-2-(4-methyl-6-phenylpyrimidin-2-yl)sulfanylacetamide835891-74-2C21H21N3O2S
- N-[2-(2-Methylphenyl)-4,6-dihydrothieno[3,4-c]pyrazol-3-yl]-2-phenoxypropanamide450340-25-7C21H21N3O2S
- 2-((1-(4-Ethoxyphenyl)-1H-imidazol-2-yl)thio)-1-(indolin-1-yl)ethanone688336-22-3C21H21N3O2S
- (E)-1-[4-(6-Methoxy-1,3-benzothiazol-2-yl)piperazin-1-yl]-3-phenylprop-2-en-1-one897468-67-6C21H21N3O2S
- 1-Morpholino-2-((4-(p-tolyl)phthalazin-1-yl)thio)ethanone924865-61-2C21H21N3O2S
- 2-(Benzylthio)-N-(5-(5,6,7,8-tetrahydronaphthalen-2-yl)-1,3,4-oxadiazol-2-yl)acetamide923423-84-1C21H21N3O2S
- 2-(Ethylsulfanyl)-N-[2-(6-oxo-4-phenyl-1,6-dihydropyrimidin-1-yl)ethyl]benzamide1334375-83-5C21H21N3O2S
- 1-(3-(3-Benzyl-1,2,4-oxadiazol-5-yl)azetidin-1-yl)-3-(phenylthio)propan-1-one1351658-50-8C21H21N3O2S
- (3,4-Dihydroquinolin-1(2H)-yl)(1-(6-methoxybenzo[d]thiazol-2-yl)azetidin-3-yl)methanone1396855-40-5C21H21N3O2S
- (5-Phenylisoxazol-3-yl)(4-((pyridin-2-ylthio)methyl)piperidin-1-yl)methanone1421516-79-1C21H21N3O2S
- (5-(Pyridin-3-yl)isoxazol-3-yl)(7-(o-tolyl)-1,4-thiazepan-4-yl)methanone1705868-02-5C21H21N3O2S
- 2-(1-(Thiophen-2-yl)cyclopentanecarbonyl)-3,4-dihydro-1H-dipyrido[1,2-a:4',3'-d]pyrimidin-11(2H)-one2034264-23-6C21H21N3O2S
- 2-[[5-[(4-Methoxyphenyl)methyl]-4-prop-2-enyl-1,2,4-triazol-3-yl]sulfanyl]-1-phenylethanone713490-18-7C21H21N3O2S
- 1-(2,4-Dimethoxyphenyl)-3-[4-(phenylamino)phenyl]thiourea516458-03-0C21H21N3O2S
- 3-(4-Ethoxyphenyl)-2-(isopropylthio)-3H-pyrimido[5,4-b]indol-4(5H)-one536710-28-8C21H21N3O2S
- N-(5-Pentan-2-yl-1,3,4-thiadiazol-2-yl)-9H-xanthene-9-carboxamide825598-52-5C21H21N3O2S
- 2-(sec-Butylthio)-3-(4-methoxyphenyl)-3H-pyrimido[5,4-b]indol-4(5H)-one536707-79-6C21H21N3O2S
- 2-Methyl-4-(3-methylthiophen-2-yl)-5-oxo-N-pyridin-2-yl-4,6,7,8-tetrahydro-1H-quinoline-3-carboxamide495377-65-6C21H21N3O2S
- 3-(4-Methoxyphenyl)-N-(2-phenyl-4,6-dihydrothieno[3,4-c]pyrazol-3-yl)propanamide872596-49-1C21H21N3O2S
- N-(2-Methoxybenzyl)-2-((6-(p-tolyl)pyridazin-3-yl)thio)acetamide896044-18-1C21H21N3O2S
- 3-(2-Methoxyethyl)-2-[(4-methylphenyl)methylsulfanyl]-5H-pyrimido[5,4-b]indol-4-one888441-09-6C21H21N3O2S
Frequently asked questions
What is the molar mass of C21H21N3O2S?
The molar mass of C21H21N3O2S is 379.48 g/mol, calculated from standard atomic weights for 21 carbon atoms, 21 hydrogen atoms, 3 nitrogen atoms, 2 oxygen atoms and 1 sulfur atom. The monoisotopic mass is 379.1354 Da.
How many compounds have the formula C21H21N3O2S?
CompoundList lists 213 compounds with the molecular formula C21H21N3O2S, including Azd-1208, 2-Methyl-N-(4-methyl-2-pyridinyl)-5-oxo-4-(2-thienyl)-1,4,5,6,7,8-hexahydro-3-quinolinecarboxamide, 2-[(5-Benzyl-4-hydroxy-6-methylpyrimidin-2-yl)thio]-N-(3-methylphenyl)acetamide. Compounds that share a formula are isomers. They contain the same atoms arranged differently, so their properties, uses and prices can be very different.
What is the degree of unsaturation of C21H21N3O2S?
C21H21N3O2S has a degree of unsaturation of 13. That is the total number of rings and pi bonds (a double bond counts as one, a triple bond as two) in any structure with this formula.