Molecular formula
C20H21NO5S
122 compounds have this formula on CompoundList.
- Molar mass
- 387.45g/mol
- Monoisotopic mass
- 387.1140Da
- Atoms
- 48
- Elements
- 5
- Rings plus double bonds
- 11
The formula C20H21NO5S describes a molecule made of 20 carbon atoms, 21 hydrogen atoms, 1 nitrogen atom, 5 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 × 2062.00%12.011 × 20 = 240.220 g/mol
- H Hydrogen × 215.46%1.008 × 21 = 21.168 g/mol
- N Nitrogen × 13.62%14.007 × 1 = 14.007 g/mol
- O Oxygen × 520.65%15.999 × 5 = 79.995 g/mol
- S Sulfur × 18.27%32.06 × 1 = 32.060 g/mol
Look up another formula
Compounds with the formula C20H21NO5S
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 100 of 122 compounds
LY 227942
CAS 116817-14-2C20H21NO5S
![4-{[4-(4-Isopropylphenyl)-3-(methoxycarbonyl)-5-methyl-2-thienyl]amino}-4-oxo-2-butenoic acid chemical structure, C20H21NO5S, CAS 444908-57-0](/s/KNWCZRXQURNYDN-MDZDMXLPSA-N.svg)
4-{[4-(4-Isopropylphenyl)-3-(methoxycarbonyl)-5-methyl-2-thienyl]amino}-4-oxo-2-butenoic acid
CAS 444908-57-0C20H21NO5S
(2S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-4-(methylsulfinyl)butanoic acid
CAS 76265-70-8C20H21NO5S
![1-[(3-Acetylphenyl)sulfonyl]-4-phenylpiperidine-4-carboxylic acid chemical structure, C20H21NO5S, CAS 793727-35-2](/s/GUQGKJJEYLYWQG-UHFFFAOYSA-N.svg)
1-[(3-Acetylphenyl)sulfonyl]-4-phenylpiperidine-4-carboxylic acid
CAS 793727-35-2C20H21NO5S
![(7,8-Dimethyl-2-oxochromen-4-yl)methyl 7a-methyl-5-oxo-2,3,6,7-tetrahydropyrrolo[2,1-b][1,3]thiazole-3-carboxylate chemical structure, C20H21NO5S, CAS 1008942-27-5](/s/MJRJAURTSRAMPJ-UHFFFAOYSA-N.svg)
(7,8-Dimethyl-2-oxochromen-4-yl)methyl 7a-methyl-5-oxo-2,3,6,7-tetrahydropyrrolo[2,1-b][1,3]thiazole-3-carboxylate
CAS 1008942-27-5C20H21NO5S
![Ethyl 2-{[3-(1,3-benzodioxol-5-yl)acryloyl]amino}-4-ethyl-5-methyl-3-thiophenecarboxylate chemical structure, C20H21NO5S, CAS 1164487-41-5](/s/MUSIUABUSKETPW-VQHVLOKHSA-N.svg)
Ethyl 2-{[3-(1,3-benzodioxol-5-yl)acryloyl]amino}-4-ethyl-5-methyl-3-thiophenecarboxylate
CAS 1164487-41-5C20H21NO5S
(E)-Ethyl 5-acetyl-2-(3-(4-methoxyphenyl)acrylamido)-4-methylthiophene-3-carboxylate
CAS 301305-68-0C20H21NO5S
![4-{[4-(3,4-Dimethylphenyl)-3-(ethoxycarbonyl)-5-methyl-2-thienyl]amino}-4-oxo-2-butenoic acid chemical structure, C20H21NO5S, CAS 444908-64-9](/s/MGXNSIJLIBPALG-CMDGGOBGSA-N.svg)
4-{[4-(3,4-Dimethylphenyl)-3-(ethoxycarbonyl)-5-methyl-2-thienyl]amino}-4-oxo-2-butenoic acid
CAS 444908-64-9C20H21NO5S
![1'-(4-Methoxybenzenesulfonyl)-3,4-dihydrospiro[1-benzopyran-2,4'-piperidine]-4-one chemical structure, C20H21NO5S, CAS 877811-45-5](/s/KMPWIUJIVJKOPF-UHFFFAOYSA-N.svg)
1'-(4-Methoxybenzenesulfonyl)-3,4-dihydrospiro[1-benzopyran-2,4'-piperidine]-4-one
CAS 877811-45-5C20H21NO5S
N-(1,1-Dioxido-2,3-dihydrothiophen-3-yl)-3,4-dimethoxy-N-(p-tolyl)benzamide
CAS 863020-65-9C20H21NO5S
6-Methoxy-3-((4-methoxyphenyl)sulfonyl)-1-propylquinolin-4(1H)-one
CAS 899214-89-2C20H21NO5S
6,7-Dimethoxy-3-(phenylsulfonyl)-1-propylquinolin-4(1H)-one
CAS 899214-95-0C20H21NO5S
![2-Oxo-2-[(tetrahydro-1,1-dioxido-3-thienyl)amino]ethyl 2-(phenylmethyl)benzoate chemical structure, C20H21NO5S, CAS 1009233-24-2](/s/CMMJEECDZMTJSL-UHFFFAOYSA-N.svg)
2-Oxo-2-[(tetrahydro-1,1-dioxido-3-thienyl)amino]ethyl 2-(phenylmethyl)benzoate
CAS 1009233-24-2C20H21NO5S
![Methyl 2-{[(2E)-3-(3,4-dimethoxyphenyl)prop-2-enoyl]amino}-5,6-dihydro-4H-cyclopenta[b]thiophene-3-carboxylate chemical structure, C20H21NO5S, CAS 292058-30-1](/s/SUUQJZFGGIVKCI-CSKARUKUSA-N.svg)
Methyl 2-{[(2E)-3-(3,4-dimethoxyphenyl)prop-2-enoyl]amino}-5,6-dihydro-4H-cyclopenta[b]thiophene-3-carboxylate
CAS 292058-30-1C20H21NO5S
![2-(1,3-Benzodioxol-5-yl)-3-[2-(3,4-dimethoxyphenyl)ethyl]-1,3-thiazolidin-4-one chemical structure, C20H21NO5S, CAS 312632-12-5](/s/IGGSMNJBKNMXIN-UHFFFAOYSA-N.svg)
2-(1,3-Benzodioxol-5-yl)-3-[2-(3,4-dimethoxyphenyl)ethyl]-1,3-thiazolidin-4-one
CAS 312632-12-5C20H21NO5S
![2-[4-[4-(Piperidine-1-carbonyl)phenyl]phenyl]sulfonylacetic acid chemical structure, C20H21NO5S, CAS 653588-61-5](/s/PKAWZIAHRPZEBF-UHFFFAOYSA-N.svg)
2-[4-[4-(Piperidine-1-carbonyl)phenyl]phenyl]sulfonylacetic acid
CAS 653588-61-5C20H21NO5S
N-(1,1-Dioxido-2,3-dihydrothiophen-3-yl)-N-(4-methoxyphenyl)-2-phenoxypropanamide
CAS 863022-80-4C20H21NO5S
2-Methyl-8-quinolyl 2,5-diethoxybenzenesulfonate
CAS 325811-10-7C20H21NO5S
N-(Furan-2-ylmethyl)-2,3,4-trimethoxy-N-(thiophen-3-ylmethyl)benzamide
CAS 1226453-62-8C20H21NO5S
![Ethyl 2-[(2,3-dihydro-1,4-benzodioxin-2-ylcarbonyl)amino]-4,5,6,7-tetrahydro-1-benzothiophene-3-carboxylate chemical structure, C20H21NO5S, CAS 301304-96-1](/s/FKZHBJGYFSPJNC-UHFFFAOYSA-N.svg)
Ethyl 2-[(2,3-dihydro-1,4-benzodioxin-2-ylcarbonyl)amino]-4,5,6,7-tetrahydro-1-benzothiophene-3-carboxylate
CAS 301304-96-1C20H21NO5S
![2-{[3-(Methoxycarbonyl)-4-phenylthiophen-2-yl]carbamoyl}cyclohexanecarboxylic acid chemical structure, C20H21NO5S, CAS 350998-82-2](/s/KHPLQEQAOVFHSZ-UHFFFAOYSA-N.svg)
2-{[3-(Methoxycarbonyl)-4-phenylthiophen-2-yl]carbamoyl}cyclohexanecarboxylic acid
CAS 350998-82-2C20H21NO5S
Fmoc-S-2-hydroxyethyl-L-cysteine
CAS 200354-35-4C20H21NO5S
![Ethyl 5-oxo-1-tosyl-2,3,4,5-tetrahydro-1H-benzo[b]azepine-4-carboxylate chemical structure, C20H21NO5S, CAS 54620-98-3](/s/UNODBEGRDZATSD-UHFFFAOYSA-N.svg)
Ethyl 5-oxo-1-tosyl-2,3,4,5-tetrahydro-1H-benzo[b]azepine-4-carboxylate
CAS 54620-98-3C20H21NO5S
![7-Methyl-2-(3,4,5-trimethoxyphenyl)-5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d][1,3]oxazin-4-one chemical structure, C20H21NO5S, CAS 315683-37-5](/s/QIEPWRLQXZUEFK-UHFFFAOYSA-N.svg)
7-Methyl-2-(3,4,5-trimethoxyphenyl)-5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d][1,3]oxazin-4-one
CAS 315683-37-5C20H21NO5S
- Ethyl 2-((6-ethyl-3-(4-methylthiazol-2-yl)-4-oxo-4H-chromen-7-yl)oxy)propanoate170466-93-0C20H21NO5S
- 2-Oxo-2-phenylethyl 4-(piperidin-1-ylsulfonyl)benzoate324044-87-3C20H21NO5S
- Ethyl 2-(2,3-dihydro-1,4-benzodioxine-6-carbonylamino)-4,5,6,7-tetrahydro-1-benzothiophene-3-carboxylate5788-12-5C20H21NO5S
- Ethyl 5-{[(2,5-dimethylphenyl)sulfonyl]amino}-2-methyl-1-benzofuran-3-carboxylate332072-83-0C20H21NO5S
- (2E)-3-Phenylprop-2-en-1-yl 4-(morpholin-4-ylsulfonyl)benzoate304475-32-9C20H21NO5S
- Thiazolidine, 3-(3-(3,4-dihydroxyphenyl)-1-oxo-2-propenyl)-2-((2-methoxyphenoxy)methyl)-161364-58-5C20H21NO5S
- Propan-2-yl 2-methyl-5-[(4-methylphenyl)sulfonylamino]-1-benzofuran-3-carboxylate332072-86-3C20H21NO5S
- (E)-2-(3-(3,4-Dimethoxyphenyl)acrylamido)-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxylic acid112282-18-5C20H21NO5S
- Methyl 5-{[(4-isopropylphenyl)sulfonyl]amino}-2-methyl-1-benzofuran-3-carboxylate442553-78-8C20H21NO5S
- Benzo[b]thiophene-3-carboxylic acid, 2-[(3-carboxy-1-oxopropyl)amino]-4,5,6,7-tetrahydro-6-phenyl-, 3-methyl ester515848-16-5C20H21NO5S
- 6,7-Dimethoxy-2-methyl-3-[4-(methylthio)phenyl]-1-oxo-1,2,3,4-tetrahydroisoquinoline-4-carboxylic acid896620-78-3C20H21NO5S
- 1 suppliersFmoc-D-Met(O)-OH2410250-48-3C20H21NO5S
- Ethyl 5-{[(4-ethylphenyl)sulfonyl]amino}-2-methyl-1-benzofuran-3-carboxylate361179-96-6C20H21NO5S
- Diethyl 3-methyl-5-{[(2E)-3-phenylprop-2-enoyl]amino}thiophene-2,4-dicarboxylate290835-18-6C20H21NO5S
- Dimethyl 2-[(3,4-dimethylbenzoyl)amino]-5,6-dihydro-4H-cyclopenta[b]thiophene-3,4-dicarboxylate433944-88-8C20H21NO5S
- (4E)-4-[Hydroxy(thiophen-2-yl)methylidene]-5-(3-methoxyphenyl)-1-(3-methoxypropyl)pyrrolidine-2,3-dione371930-07-3C20H21NO5S
- Ethyl 2-(4-(methoxycarbonyl)benzamido)-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxylate391877-00-2C20H21NO5S
- N-(1,1-Dioxidotetrahydrothiophen-3-yl)-N-(furan-2-ylmethyl)-3,6-dimethyl-1-benzofuran-2-carboxamide848919-20-0C20H21NO5S
- Methyl 2-methyl-5-[(2,4,5-trimethylphenyl)sulfonylamino]-1-benzofuran-3-carboxylate518053-05-9C20H21NO5S
- (4E)-4-[Hydroxy(thiophen-2-yl)methylidene]-5-(4-methoxyphenyl)-1-(3-methoxypropyl)pyrrolidine-2,3-dione488801-53-2C20H21NO5S
- Ethyl 5-(benzo[d][1,3]dioxol-5-ylmethyl)-2-(cyclopropanecarboxamido)-4-methylthiophene-3-carboxylate476365-83-0C20H21NO5S
- 3-Hydroxy-4-(4-methoxy-3-methylbenzoyl)-1-(2-methoxyethyl)-5-(thiophen-2-yl)-2,5-dihydro-1H-pyrrol-2-one433307-93-8C20H21NO5S
- N-(1,1-Dioxidotetrahydrothiophen-3-yl)-3-methyl-N-[(5-methylfuran-2-yl)methyl]-1-benzofuran-2-carboxamide879927-45-4C20H21NO5S
- N-(1,1-Dioxido-2,3-dihydrothien-3-yl)-N,2-bis(4-methoxyphenyl)acetamide863022-93-9C20H21NO5S
- N-(1,1-Dioxido-2,3-dihydrothiophen-3-yl)-3,5-dimethoxy-N-(p-tolyl)benzamide863020-64-8C20H21NO5S
- Ethyl 2-[(3-acetyloxybenzoyl)amino]-4,5,6,7-tetrahydro-1-benzothiophene-3-carboxylate380643-80-1C20H21NO5S
- 4-Cyclohexylphenyl 2-((2-nitrophenyl)sulfinyl)acetate1009495-82-2C20H21NO5S
- 1H-Indene-5-butanoic acid, 2,3-dihydro-2-(((4-methylphenyl)sulfonyl)amino)-gamma-oxo-114149-35-8C20H21NO5S
- 4-Hydroxy-1-[2-(2-hydroxyethoxy)ethyl]-2-(4-methylphenyl)-3-(thiophene-2-carbonyl)-2H-pyrrol-5-one843623-20-1C20H21NO5S
- Dimethyl 5-({[(1-phenylethyl)sulfanyl]acetyl}amino)benzene-1,3-dicarboxylate895929-42-7C20H21NO5S
- Methyl 2-[(1,3-benzodioxol-5-ylcarbonyl)amino]-4,5,6,7,8,9-hexahydrocycloocta[b]thiophene-3-carboxylate438617-89-1C20H21NO5S
- Ethyl 1,2-dimethyl-5-(4-methylphenyl)sulfonyloxyindole-3-carboxylate88461-72-7C20H21NO5S
- N-(2,4-Dimethoxyphenyl)-N-(1,1-dioxido-2,3-dihydrothiophen-3-yl)-2-methylbenzamide852439-36-2C20H21NO5S
- N-(2,4-Dimethoxyphenyl)-N-(1,1-dioxido-2,3-dihydrothiophen-3-yl)-3-methylbenzamide852439-37-3C20H21NO5S
- N-(1,1-Dioxidotetrahydrothiophen-3-yl)-N-(furan-2-ylmethyl)-2-(5-methyl-1-benzofuran-3-yl)acetamide880404-97-7C20H21NO5S
- N-(1,1-Dioxo-2,3-dihydro-1lambda6-thiophen-3-yl)-N-(4-ethoxyphenyl)-2-phenoxyacetamide863020-87-5C20H21NO5S
- N-(1,1-Dioxido-2,3-dihydrothien-3-yl)-N-(4-ethoxyphenyl)-4-methoxybenzamide863020-98-8C20H21NO5S
- rac Duloxetine 3-Thiophene IsoMer Oxalate116817-28-8C20H21NO5S
- (2,3-Dihydrobenzo[b][1,4]dioxin-2-yl)(1,1-dioxido-7-phenyl-1,4-thiazepan-4-yl)methanone2034607-12-8C20H21NO5S
- Benzo(c)thiophen-1(3H)-one, 3-((methyl(2-phenylethyl)amino)methyl)-, ethanedioate (1:1)97874-33-4C20H21NO5S
- Methyl 2-(2,3-dihydrobenzo[b][1,4]dioxine-6-carboxamido)-6-methyl-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxylate477553-18-7C20H21NO5S
- 3-(5-Isopropoxy-1-benzene-sulfonyl-indol-3-yl)-propionic acid835619-49-3C20H21NO5S
- 9-Methoxy-2-methyl-5-tosyl-5,6-dihydro-2H-2,6-methanobenzo[g][1,3]oxazocin-4(3H)-one1008979-31-4C20H21NO5S
- 12-(Benzenesulfonyl)-4-methoxy-9,10-dimethyl-8-oxa-10-azatricyclo[7.3.1.0^{2,7}]trideca-2,4,6-trien-11-one1009593-98-9C20H21NO5S
- N-(2-Hydroxy-2-(naphthalen-1-yl)ethyl)-2,5-dimethoxybenzenesulfonamide1351615-88-7C20H21NO5S
- 2-(1,3-Dioxoisoindol-2-yl)ethyl 2,5-diethylbenzenesulfonate494826-23-2C20H21NO5S
- 1-(3,4,5-Triethoxybenzoyl)benzo[c]isothiazol-3(1H)-one877811-78-4C20H21NO5S
- (S)-(+)-N-Methyl-3-(1-naphthalenyloxy)-3-(2-thienyl) propanamine oxalate116817-77-7C20H21NO5S
- N-(1,1-Dioxido-2,3-dihydrothiophen-3-yl)-2-ethoxy-N-(4-methoxyphenyl)benzamide863022-78-0C20H21NO5S
- 10-Methoxy-2,3-dimethyl-5-(phenylsulfonyl)-5,6-dihydro-2H-2,6-methanobenzo[g][1,3]oxazocin-4(3H)-one1009554-04-4C20H21NO5S
- Ethyl 2-(2-(benzo[d][1,3]dioxol-5-yl)acetamido)-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxylate922556-21-6C20H21NO5S
- Methyl 2-(2-(benzo[d][1,3]dioxol-5-yl)acetamido)-6-methyl-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxylate922014-02-6C20H21NO5S
- Methyl 4-(2-((phenylsulfonyl)methyl)pyrrolidine-1-carbonyl)benzoate1448045-20-2C20H21NO5S
- 1'-((2-Methoxy-5-methylphenyl)sulfonyl)-3H-spiro[isobenzofuran-1,3'-piperidin]-3-one1797858-85-5C20H21NO5S
- 1-(3-((4-Methoxyphenyl)sulfonyl)azetidin-1-yl)-4-phenylbutane-1,4-dione1704522-45-1C20H21NO5S
- 1-(6-(Methylsulfonamido)-3-methoxy-2,4-dimethylphenyl)-naphthalene-2,3-diol1832514-19-8C20H21NO5S
- Methyl 4-(1,1-dioxido-7-phenyl-1,4-thiazepane-4-carbonyl)benzoate2034308-91-1C20H21NO5S
- 2-(3,4-Dimethoxyphenyl)-N-(2-hydroxy-2-(5-(thiophen-3-yl)furan-2-yl)ethyl)acetamide2034569-35-0C20H21NO5S
- N-(2-(5-(Furan-3-yl)thiophen-2-yl)ethyl)-2,3,4-trimethoxybenzamide2034566-45-3C20H21NO5S
- 2-(Benzo[d][1,3]dioxol-5-yl)-1-(1,1-dioxido-7-phenyl-1,4-thiazepan-4-yl)ethanone2034303-67-6C20H21NO5S
- 4-(2,3-Dihydro-1,4-benzodioxine-5-carbonyl)-7-phenyl-1lambda6,4-thiazepane-1,1-dione2034335-10-7C20H21NO5S
- 2-[4-(Furan-2-yl)phenyl]-2-hydroxy-S-(4-methoxy-2-methylphenyl)ethane-1-sulfonamido2097858-36-9C20H21NO5S
- (2S,3R)-4-[(2,4-Dimethoxyphenyl)methyl]-5-oxo-3-phenylthiomorpholine-2-carboxylic acid2309600-37-9C20H21NO5S
- Ethyl 2-[[3-(1,3-benzodioxol-5-yl)-1-oxo-2-propen-1-yl]amino]-4-ethyl-5-methyl-3-thiophenecarboxylate303132-94-7C20H21NO5S
- 4-(3-Ethoxybenzoyl)-3-hydroxy-1-(2-methoxyethyl)-5-(thiophen-2-yl)-2,5-dihydro-1H-pyrrol-2-one608500-14-7C20H21NO5S
- 3-Hydroxy-4-(3-methoxybenzoyl)-1-(3-methoxypropyl)-5-(thiophen-2-yl)-2,5-dihydro-1H-pyrrol-2-one608501-43-5C20H21NO5S
- (4E)-4-[(3-Ethoxyphenyl)-hydroxymethylidene]-1-(2-methoxyethyl)-5-thiophen-2-ylpyrrolidine-2,3-dioneC20H21NO5S
- (4E)-4-[Hydroxy-(3-methoxyphenyl)methylidene]-1-(3-methoxypropyl)-5-thiophen-2-ylpyrrolidine-2,3-dioneC20H21NO5S
- 3-[6-Methoxy-3-(toluene-4-sulfonyl)-indol-1-yl]-propionic acid methyl ester889129-58-2C20H21NO5S
- Methyl 2-(4-(phenylsulfonyl)piperidine-1-carbonyl)benzoate1448029-03-5C20H21NO5S
- N-({[2,2'-Bifuran]-5-yl}methyl)-2-[4-(propane-2-sulfonyl)phenyl]acetamide2097863-60-8C20H21NO5S
- 1-(2,3-Dihydro-1,4-benzodioxine-6-sulfonyl)-3-(2,3-dihydro-1-benzofuran-5-yl)pyrrolidine2097920-12-0C20H21NO5S
- Methyl 4-{[3-(2,3-dihydro-1-benzofuran-5-yl)pyrrolidin-1-yl]sulfonyl}benzoate2097910-19-3C20H21NO5S
- 12-(Benzenesulfonyl)-5-methoxy-9,10-dimethyl-8-oxa-10-azatricyclo[7.3.1.0^{2,7}]trideca-2,4,6-trien-11-one2097910-38-6C20H21NO5S
- Quinolin-8-yl 2,5-diethoxy-4-methylbenzenesulfonate2361729-46-4C20H21NO5S
- Ethyl 4,5,6,7-tetrahydro-2-[[4-(5-methyl-2-furanyl)-1,4-dioxo-2-buten-1-yl]amino]benzo[b]thiophene-3-carboxylate326619-26-5C20H21NO5S
Frequently asked questions
What is the molar mass of C20H21NO5S?
The molar mass of C20H21NO5S is 387.45 g/mol, calculated from standard atomic weights for 20 carbon atoms, 21 hydrogen atoms, 1 nitrogen atom, 5 oxygen atoms and 1 sulfur atom. The monoisotopic mass is 387.1140 Da.
How many compounds have the formula C20H21NO5S?
CompoundList lists 122 compounds with the molecular formula C20H21NO5S, including LY 227942, 4-{[4-(4-Isopropylphenyl)-3-(methoxycarbonyl)-5-methyl-2-thienyl]amino}-4-oxo-2-butenoic acid, (2S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-4-(methylsulfinyl)butanoic acid. 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 C20H21NO5S?
C20H21NO5S has a degree of unsaturation of 11. 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.