Molecular formula
C21H24N2O6
97 compounds have this formula on CompoundList.
- Molar mass
- 400.43g/mol
- Monoisotopic mass
- 400.1634Da
- Atoms
- 53
- Elements
- 4
- Rings plus double bonds
- 11
The formula C21H24N2O6 describes a molecule made of 21 carbon atoms, 24 hydrogen atoms, 2 nitrogen atoms and 6 oxygen atoms. 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 × 2162.99%12.011 × 21 = 252.231 g/mol
- H Hydrogen × 246.04%1.008 × 24 = 24.192 g/mol
- N Nitrogen × 27.00%14.007 × 2 = 28.014 g/mol
- O Oxygen × 623.97%15.999 × 6 = 95.994 g/mol
Look up another formula
Compounds with the formula C21H24N2O6
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 97 of 97 compounds
2,5-Bis-benzyloxycarbonylamino-pentanoic acid
CAS 39897-05-7C21H24N2O6
![5-(2,3-Dimethoxyphenyl)-1-[2-(dimethylamino)ethyl]-4-(2-furoyl)-3-hydroxy-1,5-dihydro-2H-pyrrol-2-one chemical structure, C21H24N2O6, CAS 371115-66-1](/s/MWTGHGXXOATNGX-UHFFFAOYSA-N.svg)
5-(2,3-Dimethoxyphenyl)-1-[2-(dimethylamino)ethyl]-4-(2-furoyl)-3-hydroxy-1,5-dihydro-2H-pyrrol-2-one
CAS 371115-66-1C21H24N2O6
![N-[[4-(3,4-Dimethoxyphenyl)oxan-4-yl]methyl]-3-nitrobenzamide chemical structure, C21H24N2O6, CAS 301353-38-8](/s/PHFPIKQIKVSKGR-UHFFFAOYSA-N.svg)
N-[[4-(3,4-Dimethoxyphenyl)oxan-4-yl]methyl]-3-nitrobenzamide
CAS 301353-38-8C21H24N2O6
![Methyl 5-{[(4-methoxyphenoxy)acetyl]amino}-2-morpholin-4-ylbenzoate chemical structure, C21H24N2O6, CAS 767314-53-4](/s/XIICYKWGPPXDHD-UHFFFAOYSA-N.svg)
Methyl 5-{[(4-methoxyphenoxy)acetyl]amino}-2-morpholin-4-ylbenzoate
CAS 767314-53-4C21H24N2O6
![[2-[4-(4-Methoxyphenyl)piperazin-1-yl]-2-oxoethyl] 2-hydroxy-3-methoxybenzoate chemical structure, C21H24N2O6, CAS 851721-69-2](/s/UOOCRCNDGNXNMG-UHFFFAOYSA-N.svg)
[2-[4-(4-Methoxyphenyl)piperazin-1-yl]-2-oxoethyl] 2-hydroxy-3-methoxybenzoate
CAS 851721-69-2C21H24N2O6
Carbobenzyloxyglycyl-L-threonine benzyl ester
CAS 86088-51-9C21H24N2O6
Oxopropaline E
CAS 152752-60-8C21H24N2O6
Carbobenzyloxy-L-seryl-L-alanine benzyl ester
CAS 6402-95-5C21H24N2O6
Carbobenzyloxy-L-threonylglycine benzyl ester
CAS 16305-79-6C21H24N2O6
N,N'-Dicarbobenzyloxy-L-ornithine
CAS 13594-49-5C21H24N2O6
![Methyl 4-({[2-hydroxy-3-(4-methoxyphenyl)-2-methylpropyl]carbamoyl}formamido)benzoate chemical structure, C21H24N2O6, CAS 1396786-18-7](/s/OOKNVGVAALGZFA-UHFFFAOYSA-N.svg)
Methyl 4-({[2-hydroxy-3-(4-methoxyphenyl)-2-methylpropyl]carbamoyl}formamido)benzoate
CAS 1396786-18-7C21H24N2O6
3,5-Bis(3,4,5-trimethoxyphenyl)-1H-pyrazole
CAS 851729-28-7C21H24N2O6
![3-(2-(2-Hydroxy-2-(5-hydroxy-3-oxo-3,4-dihydro-2H-benzo[b][1,4]oxazin-8-yl)ethylamino)-2-methylpropyl)benzoic acid chemical structure, C21H24N2O6, CAS 1202235-80-0](/s/UICJAHNVFDQTOS-UHFFFAOYSA-N.svg)
3-(2-(2-Hydroxy-2-(5-hydroxy-3-oxo-3,4-dihydro-2H-benzo[b][1,4]oxazin-8-yl)ethylamino)-2-methylpropyl)benzoic acid
CAS 1202235-80-0C21H24N2O6
![Ethyl 2-[[2-[6-(3,4-dihydro-1H-isoquinolin-2-ylmethyl)-4-oxopyran-3-yl]oxyacetyl]amino]acetate chemical structure, C21H24N2O6, CAS 898456-58-1](/s/UFSWZRFHXRTISB-UHFFFAOYSA-N.svg)
Ethyl 2-[[2-[6-(3,4-dihydro-1H-isoquinolin-2-ylmethyl)-4-oxopyran-3-yl]oxyacetyl]amino]acetate
CAS 898456-58-1C21H24N2O6
N2,N5-Bis((phenylmethoxy)carbonyl)-L-ornithine
CAS 2274-58-0C21H24N2O6
![5'-tert-Butyl 3'-ethyl 2'-amino-6'-methyl-2-oxo-1,2-dihydrospiro[indole-3,4'-pyran]-3',5'-dicarboxylate chemical structure, C21H24N2O6, CAS 304869-96-3](/s/DSEISBKEFSNLEO-UHFFFAOYSA-N.svg)
5'-tert-Butyl 3'-ethyl 2'-amino-6'-methyl-2-oxo-1,2-dihydrospiro[indole-3,4'-pyran]-3',5'-dicarboxylate
CAS 304869-96-3C21H24N2O6
![4-(Furan-2-carbonyl)-3-hydroxy-5-(5-methylfuran-2-yl)-1-[3-(morpholin-4-yl)propyl]-2,5-dihydro-1H-pyrrol-2-one chemical structure, C21H24N2O6, CAS 380159-43-3](/s/AIVHZVNOTHWHAL-UHFFFAOYSA-N.svg)
4-(Furan-2-carbonyl)-3-hydroxy-5-(5-methylfuran-2-yl)-1-[3-(morpholin-4-yl)propyl]-2,5-dihydro-1H-pyrrol-2-one
CAS 380159-43-3C21H24N2O6
3,5-Bis(1-methylethyl) 2,6-dimethyl-4-(3-nitrophenyl)-3,5-pyridinedicarboxylate
CAS 88258-18-8C21H24N2O6
5-(2,5-Dimethoxyphenyl)-1-(2-(dimethylamino)ethyl)-4-(furan-2-carbonyl)-3-hydroxy-1H-pyrrol-2(5H)-one
CAS 638134-28-8C21H24N2O6
AC1Oebwl
CAS 23828-09-3C21H24N2O6
![4-[4-(Benzoylamino)-2,5-diethoxyanilino]-4-oxobutanoic acid chemical structure, C21H24N2O6, CAS 335219-50-6](/s/LDLQIFUXWLDWCN-UHFFFAOYSA-N.svg)
4-[4-(Benzoylamino)-2,5-diethoxyanilino]-4-oxobutanoic acid
CAS 335219-50-6C21H24N2O6
![Methyl 5-[(3,5-dimethoxybenzoyl)amino]-2-(4-morpholinyl)benzoate chemical structure, C21H24N2O6, CAS 766528-28-3](/s/GIEHUCLMFIBUGJ-UHFFFAOYSA-N.svg)
Methyl 5-[(3,5-dimethoxybenzoyl)amino]-2-(4-morpholinyl)benzoate
CAS 766528-28-3C21H24N2O6
4-(3,4-Dimethoxybenzoyl)-1-(2-(dimethylamino)ethyl)-5-(furan-2-yl)-3-hydroxy-1H-pyrrol-2(5H)-one
CAS 845647-97-4C21H24N2O6
![2-[(3-Hydroxy-2-phenylmethoxycarbonylamino-butanoyl)amino]-3-phenyl-propanoic acid chemical structure, C21H24N2O6, CAS 19649-03-7](/s/UEAPJHKMJTZURQ-UHFFFAOYSA-N.svg)
2-[(3-Hydroxy-2-phenylmethoxycarbonylamino-butanoyl)amino]-3-phenyl-propanoic acid
CAS 19649-03-7C21H24N2O6
- Methyl 6-[(3,4,5-trimethoxybenzoyl)amino]-3,4-dihydro-2H-quinoline-1-carboxylate893777-14-5C21H24N2O6
- 2,3,4-Trimethoxy-N-(5,7,8-trimethyl-3-oxo-3,4-dihydro-2H-1,4-benzoxazin-6-yl)benzamide1020241-49-9C21H24N2O6
- (S)-tert-Butyl 2-(((benzyloxy)carbonyl)amino)-3-(4-nitrophenyl)propanoate869882-71-3C21H24N2O6
- Methyl 3-(4-hydroxyphenyl)-2-[2-(phenylmethoxycarbonylamino)propanoylamino]propanoate17554-28-8C21H24N2O6
- Ethyl 2-[(methyl-phenylmethoxycarbonyl-amino)-phenylmethoxycarbonyl-amino]acetate6076-55-7C21H24N2O6
- Methyl 3-[(3,4-dimethoxybenzoyl)amino]-4-morpholin-4-ylbenzoate895078-13-4C21H24N2O6
- Benzyl ((2S,3S)-1-(2,4-dimethoxybenzyl)-2-(hydroxymethyl)-4-oxoazetidin-3-yl)carbamate86334-63-6C21H24N2O6
- Cyclopropylmethyl ethyl 2,6-dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate86781-08-0C21H24N2O6
- 3,4,5-Trimethoxy-N-[3-(4-morpholinylcarbonyl)phenyl]benzamide940505-04-4C21H24N2O6
- N-(3,3-Dimethyl-4-oxo-2,3,4,5-tetrahydrobenzo[b][1,4]oxazepin-8-yl)-3,4,5-trimethoxybenzamide921527-09-5C21H24N2O6
- N1-(2,3-dihydrobenzo[b][1,4]dioxin-6-yl)-N2-(2-hydroxy-3-(4-methoxyphenyl)-2-methylpropyl)oxalamide1396781-77-3C21H24N2O6
- 2-Morpholin-4-ylethyl 4-methyl-2-nitro-3-phenylmethoxybenzoate63879-24-3C21H24N2O6
- (2E)-3-[4-(Dimethylamino)phenyl]-2-{[(3,4,5-trimethoxyphenyl)carbonyl]amino}prop-2-enoic acid5689-63-4C21H24N2O6
- N-(4-Ethyl-5-oxo-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepin-7-yl)-3,4,5-trimethoxybenzamide922001-15-8C21H24N2O6
- Ethyl 2-(2-((6-((3,4-dihydroquinolin-1(2H)-yl)methyl)-4-oxo-4H-pyran-3-yl)oxy)acetamido)acetate898417-76-0C21H24N2O6
- Methyl 9-(cyclopentyloxy)-3-(2-furanylcarbonyl)-1,2,3,4,5,7-hexahydro-7-oxopyrido[1,2-d][1,4]diazepine-10-carboxylate1185386-17-7C21H24N2O6
- N-(3,3-Dimethyl-4-oxo-2,3,4,5-tetrahydrobenzo[b][1,4]oxazepin-7-yl)-3,4,5-trimethoxybenzamide921865-56-7C21H24N2O6
- Ethyl N-[(benzyloxy)carbonyl]glycyltyrosinate3249-01-2C21H24N2O6
- 4-(1-Methylethoxy)benzoic acid 2-[2-[4-(ethoxycarbonyl)phenoxy]acetyl]hydrazide880579-35-1C21H24N2O6
- N,1-bis(2,4-dimethoxyphenyl)-5-oxopyrrolidine-3-carboxamide1007998-35-7C21H24N2O6
- 4,7-Dimethoxy-1-methyl-N-(3,4,5-trimethoxyphenyl)-1H-indole-2-carboxamide1351701-14-8C21H24N2O6
- Acetanilide, N-(1-methyl-3-pyrrolidinyl)-2-phenoxy-, oxalate (1:1)21820-62-2C21H24N2O6
- Ethyl 4-{3-hydroxy-4-nitrophenyl}-2,7,7-trimethyl-5-oxo-1,4,5,6,7,8-hexahydro-3-quinolinecarboxylate503428-22-6C21H24N2O6
- Boc-L-Phe-OBzl(4-NO2)72169-50-7C21H24N2O6
- (S)-tert-Butyl 2-(((benzyloxy)carbonyl)-amino)-3-(4-nitrophenyl)propanoate2663703-16-8C21H24N2O6
- Benzyl N~2~-{[(4-methoxyphenyl)methoxy]carbonyl}-L-glutaminate101854-43-7C21H24N2O6
- 8-tert-Butyl 3-(1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl) (1R,3S,5S)-8-azabicyclo[3.2.1]octane-3,8-dicarboxylate2248186-11-8C21H24N2O6
- 1 suppliersLys(Z)-NPC1387552-55-7C21H24N2O6
- 4-tert-Butyl 7-(1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl) 4-azaspiro[2.5]octane-4,7-dicarboxylate2248308-93-0C21H24N2O6
- 1-tert-Butyl 3-(1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl) 3-(prop-2-en-1-yl)pyrrolidine-1,3-dicarboxylate2248301-99-5C21H24N2O6
- rac-1-tert-butyl 3a-(1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl) (3aR,6aS)-octahydrocyclopenta[b]pyrrole-1,3a-dicarboxylate2248409-02-9C21H24N2O6
- rac-1-tert-Butyl 3-(1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl) (3R,4R)-4-[(1E)-prop-1-en-1-yl]pyrrolidine-1,3-dicarboxylate2287236-44-4C21H24N2O6
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 6-{[(tert-butoxy)carbonyl]amino}bicyclo[3.2.0]heptane-3-carboxylate2248409-23-4C21H24N2O6
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 1-({[(tert-butoxy)carbonyl]amino}methyl)spiro[2.3]hexane-1-carboxylate2248370-39-8C21H24N2O6
- 6-tert-Butyl 5-(1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl) 6-azaspiro[3.4]octane-5,6-dicarboxylate2248261-02-9C21H24N2O6
- 6-tert-Butyl 8-(1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl) 6-azaspiro[3.4]octane-6,8-dicarboxylate2248296-25-3C21H24N2O6
- 2-tert-Butyl 1-(1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl) 2-azaspiro[3.4]octane-1,2-dicarboxylate2248267-40-3C21H24N2O6
- 3-tert-Butyl 7-(1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl) 3-azabicyclo[5.1.0]octane-3,7-dicarboxylate2248360-06-5C21H24N2O6
- 6-tert-Butyl 5-(1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl) 6-azaspiro[2.5]octane-5,6-dicarboxylate2248259-76-7C21H24N2O6
- 1-tert-Butyl 2-(1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl) 5-cyclopropylpyrrolidine-1,2-dicarboxylate2248259-80-3C21H24N2O6
- tert-Butyl (6S)-6-{2-[(1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl)oxy]-2-oxoethyl}-5-azaspiro[2.4]heptane-5-carboxylate2248176-05-6C21H24N2O6
- 6-tert-Butyl 7-(1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl) 6-azaspiro[3.4]octane-6,7-dicarboxylate2248266-43-3C21H24N2O6
- 6-tert-Butyl 1-(1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl) 6-azaspiro[2.5]octane-1,6-dicarboxylate2248317-17-9C21H24N2O6
- 2-tert-Butyl 4-(1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl) 2-azabicyclo[2.2.2]octane-2,4-dicarboxylate2248385-46-6C21H24N2O6
- tert-Butyl 1-{3-[(1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl)oxy]-3-oxopropyl}-2-azabicyclo[2.1.1]hexane-2-carboxylate2248279-12-9C21H24N2O6
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 5-{[(tert-butoxy)carbonyl]amino}bicyclo[2.2.1]heptane-2-carboxylate2248324-71-0C21H24N2O6
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 4-{[(tert-butoxy)carbonyl]amino}bicyclo[2.2.1]heptane-1-carboxylate2248352-70-5C21H24N2O6
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 2-{1-[2-(morpholin-4-yl)-2-oxoethyl]cyclopentyl}acetate2248274-05-5C21H24N2O6
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 5-{[(tert-butoxy)carbonyl]amino}bicyclo[3.1.1]heptane-1-carboxylate2248369-31-3C21H24N2O6
- 5-tert-Butyl 2-(1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl) 5-azaspiro[3.4]octane-2,5-dicarboxylate2248294-82-6C21H24N2O6
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 2-{[(tert-butoxy)carbonyl]amino}spiro[3.3]heptane-2-carboxylate2248286-18-0C21H24N2O6
- 4-tert-Butyl 1-(1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl) 4-azabicyclo[5.1.0]octane-1,4-dicarboxylate2248310-89-4C21H24N2O6
- 1-tert-Butyl 2-(1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl) (2S,3aS,6aS)-octahydrocyclopenta[b]pyrrole-1,2-dicarboxylate2248171-86-8C21H24N2O6
- rac-1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl (1R,2S,3R,4S)-3-{[(tert-butoxy)carbonyl]amino}bicyclo[2.2.1]heptane-2-carboxylate2248413-96-7C21H24N2O6
- (2S)-2-(2-{[(Benzyloxy)carbonyl]amino}-2-methylpropanamido)-3-(4-hydroxyphenyl)propanoic acid2757836-55-6C21H24N2O6
- 6-tert-Butyl 5-(1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl) 6-azabicyclo[3.2.1]octane-5,6-dicarboxylate2248270-73-5C21H24N2O6
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 1-{[(tert-butoxy)carbonyl](cyclopropyl)amino}cyclobutane-1-carboxylate2248293-56-1C21H24N2O6
- 2-{[(Benzyloxy)carbonyl]amino}-5-{[(tert-butoxy)carbonyl](methyl)amino}benzoic acid2694746-61-5C21H24N2O6
- 5-tert-Butyl 1-(1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl) 5-azaspiro[2.5]octane-1,5-dicarboxylate2248347-21-7C21H24N2O6
- 2-tert-Butyl 6-(1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl) 2-azabicyclo[2.2.2]octane-2,6-dicarboxylate2248373-49-9C21H24N2O6
- 1,5-Methano-8H-pyrido[1,2-a][1,5]diazocin-8-one, 1,2,3,4,5,6-hexahydro-3-(2-phenoxyethyl)-, (1S,5R)-, ethanedioate (1:1)767331-47-5C21H24N2O6
- 1,4-Benzenedicarboxylic acid,2-amino-5-[[(1,1-dimethylethoxy)carbonyl]amino]-,1-methyl 4-(phenylmethyl)ester1146730-28-0C21H24N2O6
- 1,4-Benzenedicarboxylic acid,2-amino-5-[[(1,1-dimethylethoxy)carbonyl]amino]-,4-methyl 1-(phenylmethyl)ester1146730-27-9C21H24N2O6
- N-Acetyl-L-tyrosyl-L-tyrosine methyl ester940962-25-4C21H24N2O6
- 8-[2-(2,6-Dioxo-3-piperidyl)-1,3-dioxo-isoindolin-4-yl]oxyoctanal2636072-55-2C21H24N2O6
- Dimethyl 2-(1-(tert-butoxycarbonyl)-1H-indazol-6-yl)bicyclo[1.1.1]pentane-1,3-dicarboxylate2873410-88-7C21H24N2O6
- rac-1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl (1R,5R,6S)-6-{[(tert-butoxy)carbonyl]amino}bicyclo[3.2.0]heptane-3-carboxylate2248223-96-1C21H24N2O6
- rac-1-tert-Butyl 3-(1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl) (3R,4R)-4-cyclopropylpyrrolidine-1,3-dicarboxylate2248367-40-8C21H24N2O6
- rac-2-tert-butyl 3a-(1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl) (3aR,6aR)-octahydrocyclopenta[c]pyrrole-2,3a-dicarboxylate2248343-50-0C21H24N2O6
- rac-1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl (1R,3S,5R,6R)-6-{[(tert-butoxy)carbonyl]amino}bicyclo[3.2.0]heptane-3-carboxylate2248299-57-0C21H24N2O6
- rac-2-tert-butyl 1-(1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl) (1R,3aR,6aS)-octahydrocyclopenta[c]pyrrole-1,2-dicarboxylate2248382-70-7C21H24N2O6
- 3-(tert-Butyl) 1-(1,3-dioxoisoindolin-2-yl) 5-methyl-3-azabicyclo[3.1.1]heptane-1,3-dicarboxylate2932440-22-5C21H24N2O6
- 2-[2-(2-Hydroxyethoxy)ethoxy]ethanol, 1-isocyanato-4-[(4-isocyanatophenyl)methyl]benzene32877-92-2C21H24N2O6
Frequently asked questions
What is the molar mass of C21H24N2O6?
The molar mass of C21H24N2O6 is 400.43 g/mol, calculated from standard atomic weights for 21 carbon atoms, 24 hydrogen atoms, 2 nitrogen atoms and 6 oxygen atoms. The monoisotopic mass is 400.1634 Da.
How many compounds have the formula C21H24N2O6?
CompoundList lists 97 compounds with the molecular formula C21H24N2O6, including 2,5-Bis-benzyloxycarbonylamino-pentanoic acid, 5-(2,3-Dimethoxyphenyl)-1-[2-(dimethylamino)ethyl]-4-(2-furoyl)-3-hydroxy-1,5-dihydro-2H-pyrrol-2-one, N-[[4-(3,4-Dimethoxyphenyl)oxan-4-yl]methyl]-3-nitrobenzamide. 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 C21H24N2O6?
C21H24N2O6 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.