Molecular formula
C10H12F3NO4
97 compounds have this formula on CompoundList.
- Molar mass
- 267.20g/mol
- Monoisotopic mass
- 267.0718Da
- Atoms
- 30
- Elements
- 5
- Rings plus double bonds
- 4
The formula C10H12F3NO4 describes a molecule made of 10 carbon atoms, 12 hydrogen atoms, 3 fluorine atoms, 1 nitrogen atom and 4 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 × 1044.95%12.011 × 10 = 120.110 g/mol
- H Hydrogen × 124.53%1.008 × 12 = 12.096 g/mol
- F Fluorine × 321.33%18.998 × 3 = 56.994 g/mol
- N Nitrogen × 15.24%14.007 × 1 = 14.007 g/mol
- O Oxygen × 423.95%15.999 × 4 = 63.996 g/mol
Look up another formula
Compounds with the formula C10H12F3NO4
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 97 of 97 compounds
Methyl 3-(3-methylazetidin-3-yl)prop-2-ynoate, trifluoroacetic acid
CAS 2947423-75-6C10H12F3NO4
4-O-Acetyl-1,5-anhydro-2,3,6-trideoxy-3-trifluoroacetamidohex-1-enitol
CAS 73352-88-2C10H12F3NO4
1-(4-(Trifluoromethoxy)phenyl)ethan-1-amine carbonate
CAS 1415564-50-9C10H12F3NO4
7-Oxabicyclo(2.2.1)heptane-2-carboxylic acid, 3-((2,2,2-trifluoroethyl)carbamoyl)-
CAS 73806-06-1C10H12F3NO4
![(2S)-2-[(Methoxycarbonyl)amino]-2-[3-(trifluoromethyl)bicyclo[1.1.1]pentan-1-yl]acetic acid chemical structure, C10H12F3NO4, CAS 1359869-34-3](/s/XZNSODXWWKJGPJ-RORPDPNFSA-N.svg)
(2S)-2-[(Methoxycarbonyl)amino]-2-[3-(trifluoromethyl)bicyclo[1.1.1]pentan-1-yl]acetic acid
CAS 1359869-34-3C10H12F3NO4
![rac-(2R,3R)-1-[(Prop-2-en-1-yloxy)carbonyl]-3-(trifluoromethyl)pyrrolidine-2-carboxylic acid chemical structure, C10H12F3NO4, CAS 2679830-97-6](/s/HOCUNXNJWGDIMB-BQBZGAKWSA-N.svg)
rac-(2R,3R)-1-[(Prop-2-en-1-yloxy)carbonyl]-3-(trifluoromethyl)pyrrolidine-2-carboxylic acid
CAS 2679830-97-6C10H12F3NO4
![rac-(2R,5S)-1-[(Prop-2-en-1-yloxy)carbonyl]-5-(trifluoromethyl)pyrrolidine-2-carboxylic acid chemical structure, C10H12F3NO4, CAS 2679838-42-5](/s/PGMZRKAATBIQEB-NKWVEPMBSA-N.svg)
rac-(2R,5S)-1-[(Prop-2-en-1-yloxy)carbonyl]-5-(trifluoromethyl)pyrrolidine-2-carboxylic acid
CAS 2679838-42-5C10H12F3NO4
![3-{[(Prop-2-en-1-yloxy)carbonyl]amino}-3-(trifluoromethyl)cyclobutane-1-carboxylic acid chemical structure, C10H12F3NO4, CAS 2680818-31-7](/s/RZNIOQABLFQAIG-UHFFFAOYSA-N.svg)
3-{[(Prop-2-en-1-yloxy)carbonyl]amino}-3-(trifluoromethyl)cyclobutane-1-carboxylic acid
CAS 2680818-31-7C10H12F3NO4
(2S)-2-(Prop-1-yn-1-yl)pyrrolidine-2-carboxylic acid, trifluoroacetic acid
CAS 2768300-43-0C10H12F3NO4
![1-[(Prop-2-en-1-yloxy)carbonyl]-3-(trifluoromethyl)pyrrolidine-3-carboxylic acid chemical structure, C10H12F3NO4, CAS 1408947-81-8](/s/GRCOMVHZJBTOGG-UHFFFAOYSA-N.svg)
1-[(Prop-2-en-1-yloxy)carbonyl]-3-(trifluoromethyl)pyrrolidine-3-carboxylic acid
CAS 1408947-81-8C10H12F3NO4
![7-(2,2,2-Trifluoroacetyl)-2-oxa-7-azaspiro[4.4]nonane-9-carboxylic acid chemical structure, C10H12F3NO4, CAS 2680864-85-9](/s/IXGFZOYSELQTCJ-UHFFFAOYSA-N.svg)
7-(2,2,2-Trifluoroacetyl)-2-oxa-7-azaspiro[4.4]nonane-9-carboxylic acid
CAS 2680864-85-9C10H12F3NO4
Ethyl 4-oxo-1-(2,2,2-trifluoroacetyl)piperidine-3-carboxylate
CAS 1206625-64-0C10H12F3NO4
Ethyl 3-Oxo-1-(2,2,2-trifluoroacetyl)piperidine-4-carboxylate
CAS 1908013-81-9C10H12F3NO4
Methyl 3-(pyrrolidin-2-yl)propiolate 2,2,2-trifluoroacetate
CAS 2920428-18-6C10H12F3NO4
![5-Methoxy-3-(2,2,2-trifluoroacetyl)-3-azabicyclo[3.1.1]heptane-1-carboxylic acid chemical structure, C10H12F3NO4, CAS 2803847-60-9](/s/PIOPHPSAKMYKMO-UHFFFAOYSA-N.svg)
5-Methoxy-3-(2,2,2-trifluoroacetyl)-3-azabicyclo[3.1.1]heptane-1-carboxylic acid
CAS 2803847-60-9C10H12F3NO4
![2-{[(tert-Butoxy)carbonyl]amino}-2-(trifluoromethyl)but-3-ynoic acid chemical structure, C10H12F3NO4, CAS 2248272-55-9](/s/MLXROOSBZKAYTL-UHFFFAOYSA-N.svg)
2-{[(tert-Butoxy)carbonyl]amino}-2-(trifluoromethyl)but-3-ynoic acid
CAS 2248272-55-9C10H12F3NO4
![2-(2,2,2-Trifluoroacetamido)-6-oxaspiro[3.4]octane-2-carboxylic acid chemical structure, C10H12F3NO4, CAS 2803846-02-6](/s/DNXFLZPKFQHWJH-UHFFFAOYSA-N.svg)
2-(2,2,2-Trifluoroacetamido)-6-oxaspiro[3.4]octane-2-carboxylic acid
CAS 2803846-02-6C10H12F3NO4
![1-(Methoxymethyl)-2-(2,2,2-trifluoroacetyl)-2-azabicyclo[2.1.1]hexane-4-carboxylic acid chemical structure, C10H12F3NO4, CAS 2757924-63-1](/s/BAEDYLAIUWYMKP-UHFFFAOYSA-N.svg)
1-(Methoxymethyl)-2-(2,2,2-trifluoroacetyl)-2-azabicyclo[2.1.1]hexane-4-carboxylic acid
CAS 2757924-63-1C10H12F3NO4
![1-[(Prop-2-en-1-yloxy)carbonyl]-2-(trifluoromethyl)pyrrolidine-2-carboxylic acid chemical structure, C10H12F3NO4, CAS 2757952-24-0](/s/CZXAYUZRPZEMOL-UHFFFAOYSA-N.svg)
1-[(Prop-2-en-1-yloxy)carbonyl]-2-(trifluoromethyl)pyrrolidine-2-carboxylic acid
CAS 2757952-24-0C10H12F3NO4
![1-Methyl-3-[(2,2,2-trifluoroacetamido)methyl]-2-oxabicyclo[2.1.1]hexane-4-carboxylic acid chemical structure, C10H12F3NO4, CAS 2757891-27-1](/s/FWHWWYWFOJCDTH-UHFFFAOYSA-N.svg)
1-Methyl-3-[(2,2,2-trifluoroacetamido)methyl]-2-oxabicyclo[2.1.1]hexane-4-carboxylic acid
CAS 2757891-27-1C10H12F3NO4
![2-(2,2,2-Trifluoroacetyl)-6-oxa-2-azaspiro[3.5]nonane-7-carboxylic acid chemical structure, C10H12F3NO4, CAS 2680794-09-4](/s/ASVBLDCGXZCKGN-UHFFFAOYSA-N.svg)
2-(2,2,2-Trifluoroacetyl)-6-oxa-2-azaspiro[3.5]nonane-7-carboxylic acid
CAS 2680794-09-4C10H12F3NO4
![2-[2-(2,2,2-Trifluoroacetyl)-5-oxa-2-azaspiro[3.4]octan-6-yl]acetic acid chemical structure, C10H12F3NO4, CAS 2680818-25-9](/s/UTGQYYCXQIZHGT-UHFFFAOYSA-N.svg)
2-[2-(2,2,2-Trifluoroacetyl)-5-oxa-2-azaspiro[3.4]octan-6-yl]acetic acid
CAS 2680818-25-9C10H12F3NO4
![8-(2,2,2-Trifluoroacetyl)-5-oxa-8-azaspiro[3.5]nonane-6-carboxylic acid chemical structure, C10H12F3NO4, CAS 2680861-04-3](/s/ZOBSNSNYYQHWEY-UHFFFAOYSA-N.svg)
8-(2,2,2-Trifluoroacetyl)-5-oxa-8-azaspiro[3.5]nonane-6-carboxylic acid
CAS 2680861-04-3C10H12F3NO4
![5-(2,2,2-Trifluoroacetyl)-8-oxa-5-azaspiro[3.5]nonane-7-carboxylic acid chemical structure, C10H12F3NO4, CAS 2680719-96-2](/s/YWHPOZADJGBZTP-UHFFFAOYSA-N.svg)
5-(2,2,2-Trifluoroacetyl)-8-oxa-5-azaspiro[3.5]nonane-7-carboxylic acid
CAS 2680719-96-2C10H12F3NO4
- 3-Hydroxy-1-(2,2,2-trifluoroacetamido)spiro[3.3]heptane-1-carboxylic acid2680606-46-4C10H12F3NO4
- rac-(4aR,7aR)-6-(2,2,2-trifluoroacetyl)-octahydropyrano[2,3-c]pyrrole-7a-carboxylic acid2679931-44-1C10H12F3NO4
- rac-(4aR,7aS)-4-(2,2,2-trifluoroacetyl)-octahydrocyclopenta[b][1,4]oxazine-6-carboxylic acid2680522-78-3C10H12F3NO4
- 2-Cyclopropyl-3,3,3-trifluoro-2-{[(prop-2-en-1-yloxy)carbonyl]amino}propanoic acid2680728-84-9C10H12F3NO4
- 4-Oxo-4-[1-(2,2,2-trifluoroacetyl)pyrrolidin-2-yl]butanoic acid2680767-06-8C10H12F3NO4
- 2-{[(Prop-2-en-1-yloxy)carbonyl]amino}-2-[1-(trifluoromethyl)cyclopropyl]acetic acid2680621-35-4C10H12F3NO4
- 2-[2-(2,2,2-Trifluoroacetyl)-6-oxa-2-azaspiro[3.4]octan-7-yl]acetic acid2680702-79-6C10H12F3NO4
- 4-(Methoxymethyl)-2-(2,2,2-trifluoroacetyl)-2-azabicyclo[2.1.1]hexane-1-carboxylic acid2680759-87-7C10H12F3NO4
- rac-(1R,6S,7S)-7-(2,2,2-Trifluoroacetamido)-2-oxabicyclo[4.2.0]octane-7-carboxylic acid2679802-58-3C10H12F3NO4
- 2-(Trifluoroacetyl)-octahydropyrano[3,4-c]pyrrole-7a-carboxylic acid2286698-06-2C10H12F3NO4
- 1-(2,2,2-Trifluoroacetyl)-7-oxa-1-azaspiro[3.5]nonane-3-carboxylic acid2680694-54-4C10H12F3NO4
- 1-(Acetamidomethyl)-3-(trifluoromethyl)-2-oxabicyclo[2.1.1]hexane-4-carboxylic acid2680825-68-5C10H12F3NO4
- 2-(2,2,2-Trifluoroacetyl)-5-oxa-2-azaspiro[3.5]nonane-6-carboxylic acid2680624-94-4C10H12F3NO4
- 1-[1-(2,2,2-Trifluoroacetamido)ethyl]-2-oxabicyclo[2.1.1]hexane-4-carboxylic acid2680825-71-0C10H12F3NO4
- 8-(2,2,2-Trifluoroacetyl)-5-oxa-8-azaspiro[3.5]nonane-7-carboxylic acid2680607-26-3C10H12F3NO4
- 4-(2,2,2-Trifluoroacetyl)-octahydrocyclopenta[b][1,4]oxazine-6-carboxylic acid2680833-17-2C10H12F3NO4
- rac-(3R,5R)-1-[(Prop-2-en-1-yloxy)carbonyl]-5-(trifluoromethyl)pyrrolidine-3-carboxylic acid2679932-29-5C10H12F3NO4
- 4-(2,2,2-Trifluoroacetamido)-2-oxabicyclo[2.2.2]octane-1-carboxylic acid2680747-84-4C10H12F3NO4
- 1-[(Prop-2-en-1-yloxy)carbonyl]-5-(trifluoromethyl)pyrrolidine-3-carboxylic acid2680785-84-4C10H12F3NO4
- 2-Methyl-4-(2,2,2-trifluoroacetyl)-hexahydro-2H-furo[3,2-b]pyrrole-5-carboxylic acid2680585-62-8C10H12F3NO4
- rac-(4aR,7aR)-1-(2,2,2-trifluoroacetyl)-octahydrofuro[3,4-b]pyridine-4a-carboxylic acid2679934-30-4C10H12F3NO4
- 1-[(Trifluoroacetamido)methyl]-2-oxabicyclo[3.1.1]heptane-5-carboxylic acid2680709-33-3C10H12F3NO4
- rac-(4aR,7aS)-1-(2,2,2-trifluoroacetyl)-octahydrofuro[3,4-b]pyridine-4a-carboxylic acid2679941-50-3C10H12F3NO4
- 1-[(Trifluoroacetamido)methyl]-2-oxabicyclo[2.2.1]heptane-4-carboxylic acid2680773-23-1C10H12F3NO4
- rac-(2R,3aS,5R,6aS)-2-methyl-4-(2,2,2-trifluoroacetyl)-hexahydro-2H-furo[3,2-b]pyrrole-5-carboxylic acid2679928-71-1C10H12F3NO4
- rac-(1R,4R,5R)-1-[(2,2,2-Trifluoroacetamido)methyl]-2-oxabicyclo[2.2.1]heptane-5-carboxylic acid2679831-06-0C10H12F3NO4
- 8-(2,2,2-Trifluoroacetyl)-5-oxa-8-azaspiro[3.5]nonane-9-carboxylic acid2680607-27-4C10H12F3NO4
- rac-(4aR,7aS)-6-(2,2,2-trifluoroacetyl)-octahydropyrano[2,3-c]pyrrole-4a-carboxylic acid2679835-51-7C10H12F3NO4
- (1s,3s)-3-{[(Prop-2-en-1-yloxy)carbonyl]amino}-1-(trifluoromethyl)cyclobutane-1-carboxylic acid2680773-44-6C10H12F3NO4
- 3-Methyl-1-[(2,2,2-trifluoroacetamido)methyl]-2-oxabicyclo[2.1.1]hexane-4-carboxylic acid2680658-71-1C10H12F3NO4
- (2S,4S)-1-[(Prop-2-en-1-yloxy)carbonyl]-4-(trifluoromethyl)pyrrolidine-2-carboxylic acid2679932-38-6C10H12F3NO4
- 3-(2-Oxopropyl)-1-(2,2,2-trifluoroacetyl)pyrrolidine-3-carboxylic acid2680747-92-4C10H12F3NO4
- 2-(Prop-2-en-1-yl)-4-(2,2,2-trifluoroacetyl)morpholine-2-carboxylic acid2680773-58-2C10H12F3NO4
- 1-[3-Hydroxy-1-(2,2,2-trifluoroacetyl)azetidin-3-yl]cyclobutane-1-carboxylic acid2680717-64-8C10H12F3NO4
- rac-(3aR,7aR)-2-(2,2,2-trifluoroacetyl)-octahydropyrano[3,4-c]pyrrole-3a-carboxylic acid2679936-94-6C10H12F3NO4
- rac-(3R,4R)-1-[(Prop-2-en-1-yloxy)carbonyl]-4-(trifluoromethyl)pyrrolidine-3-carboxylic acid2679934-37-1C10H12F3NO4
- 1-[(Prop-2-en-1-yloxy)carbonyl]-5-(trifluoromethyl)pyrrolidine-2-carboxylic acid2680587-27-1C10H12F3NO4
- 1-[(2,2,2-Trifluoroacetamido)methyl]-2-oxabicyclo[3.1.1]heptane-4-carboxylic acid2680856-39-5C10H12F3NO4
- 2-{[5-(2,2,2-Trifluoroacetyl)-5-azaspiro[2.4]heptan-7-yl]oxy}acetic acid2680875-57-2C10H12F3NO4
- 1-[(Prop-2-en-1-yloxy)carbonyl]-4-(trifluoromethyl)pyrrolidine-2-carboxylic acid2680560-72-7C10H12F3NO4
- rac-(3aR,7aS)-1-(2,2,2-trifluoroacetyl)-octahydropyrano[4,3-b]pyrrole-3a-carboxylic acid2679831-80-0C10H12F3NO4
- 6-(2,2,2-Trifluoroacetyl)-octahydropyrano[2,3-c]pyrrole-7a-carboxylic acid2680661-98-5C10H12F3NO4
- 2-[4-(2,2,2-Trifluoroacetyl)-7-oxa-4-azaspiro[2.5]octan-6-yl]acetic acid2680839-98-7C10H12F3NO4
- 3,3-Dimethyl-4-(2,2,2-trifluoroacetamido)-2-oxabicyclo[2.1.1]hexane-1-carboxylic acid2680660-03-9C10H12F3NO4
- 9-(2,2,2-Trifluoroacetyl)-5-oxa-9-azaspiro[3.5]nonane-2-carboxylic acid2680687-56-1C10H12F3NO4
- 7-(2,2,2-Trifluoroacetyl)-3-oxa-7-azabicyclo[3.3.1]nonane-9-carboxylic acid2680772-33-0C10H12F3NO4
- rac-(2R,3aS,5S,6aS)-2-methyl-4-(2,2,2-trifluoroacetyl)-hexahydro-2H-furo[3,2-b]pyrrole-5-carboxylic acid2679839-41-7C10H12F3NO4
- rac-(4aR,6S,7aS)-4-(2,2,2-trifluoroacetyl)-octahydrocyclopenta[b][1,4]oxazine-6-carboxylic acid2679832-54-1C10H12F3NO4
- 2-(2,2,2-Trifluoroacetyl)-7-oxa-2-azaspiro[3.5]nonane-1-carboxylic acid2680561-41-3C10H12F3NO4
- rac-(1R,3S)-3-Hydroxy-1-(2,2,2-trifluoroacetamido)spiro[3.3]heptane-1-carboxylic acid2679837-92-2C10H12F3NO4
- rac-(3aR,7aR)-2-(trifluoroacetyl)-octahydropyrano[3,4-c]pyrrole-7a-carboxylic acid2290746-29-9C10H12F3NO4
- 2-{[(Prop-2-en-1-yloxy)carbonyl]amino}-2-[2-(trifluoromethyl)cyclopropyl]acetic acid2680550-12-1C10H12F3NO4
- (2R,3R)-1-[(Prop-2-en-1-yloxy)carbonyl]-3-(trifluoromethyl)pyrrolidine-2-carboxylic acid2679808-61-6C10H12F3NO4
- 1-[(Prop-2-en-1-yloxy)carbonyl]-2-(trifluoromethyl)pyrrolidine-3-carboxylic acid2680748-34-7C10H12F3NO4
- rac-(1R,2R)-1-({[(Prop-2-en-1-yloxy)carbonyl]amino}methyl)-2-(trifluoromethyl)cyclopropane-1-carboxylic acid2679813-39-7C10H12F3NO4
- 3-[5-Hydroxy-2-(trifluoromethyl)cyclohexyl]-1,3-oxazolidine-2,4-dione2138088-82-9C10H12F3NO4
- 2-Hydroxy-6-(2,2,2-trifluoroacetyl)-6-azaspiro[3.4]octane-2-carboxylic acid2764017-42-5C10H12F3NO4
- 1-Methyl-4-[(2,2,2-trifluoroacetamido)methyl]-2-oxabicyclo[2.1.1]hexane-3-carboxylic acid2763908-98-9C10H12F3NO4
- 5-(2,2,2-Trifluoroacetyl)-2-oxa-5-azaspiro[3.5]nonane-7-carboxylic acid2870689-48-6C10H12F3NO4
- 4-[(2,2,2-Trifluoroacetamido)methyl]-7-oxabicyclo[2.2.1]heptane-1-carboxylic acid2870660-97-0C10H12F3NO4
- (1R,5S,7s)-3-(2,2,2-Trifluoroacetyl)-9-oxa-3-azabicyclo[3.3.1]nonane-7-carboxylic acid2920084-52-0C10H12F3NO4
- 1-({[(Prop-2-en-1-yloxy)carbonyl]amino}methyl)-2-(trifluoromethyl)cyclopropane-1-carboxylic acid2913404-25-6C10H12F3NO4
- 3-(2,2,2-Trifluoroacetyl)-9-oxa-3-azabicyclo[3.3.1]nonane-7-carboxylic acid2920131-78-6C10H12F3NO4
- 5-(Hydroxymethyl)-3-(2,2,2-trifluoroacetyl)-3-azabicyclo[3.1.1]heptane-1-carboxylic acid2913423-24-0C10H12F3NO4
- 1-(2,2,2-Trifluoroacetyl)-7-oxa-1-azaspiro[3.5]nonane-2-carboxylic acid2913401-81-5C10H12F3NO4
- 5-Aminotricyclo[2.2.1.0,2,6]heptane-3-carboxylic acid, trifluoroacetic acid2955708-00-4C10H12F3NO4
- rac-(3aR,5R,7aR)-4-(2,2,2-trifluoroacetyl)-octahydrofuro[3,2-b]pyridine-5-carboxylic acid2679934-40-6C10H12F3NO4
- rac-(4R,4aS,7aS)-1-(2,2,2-trifluoroacetyl)-octahydrofuro[3,4-b]pyridine-4-carboxylic acid2679828-91-0C10H12F3NO4
- rac-(1R,3R)-3-Hydroxy-1-(2,2,2-trifluoroacetamido)spiro[3.3]heptane-1-carboxylic acid2679920-48-8C10H12F3NO4
- rac-(4aR,7aR)-1-(2,2,2-trifluoroacetyl)-octahydrofuro[3,4-b]pyridine-4-carboxylic acid2680522-58-9C10H12F3NO4
- rac-(2R,4aR,7aS)-6-(2,2,2-trifluoroacetyl)-octahydropyrano[2,3-c]pyrrole-2-carboxylic acid2679943-78-1C10H12F3NO4
- rac-(3aR,7aS)-5-(2,2,2-trifluoroacetyl)-octahydrofuro[3,2-c]pyridine-4-carboxylic acid2870635-02-0C10H12F3NO4
- 2-((2-(2,2,2-Trifluoroacetyl)-2-azaspiro[3.3]heptan-6-yl)oxy)acetic acid3083473-93-9C10H12F3NO4
Frequently asked questions
What is the molar mass of C10H12F3NO4?
The molar mass of C10H12F3NO4 is 267.20 g/mol, calculated from standard atomic weights for 10 carbon atoms, 12 hydrogen atoms, 3 fluorine atoms, 1 nitrogen atom and 4 oxygen atoms. The monoisotopic mass is 267.0718 Da.
How many compounds have the formula C10H12F3NO4?
CompoundList lists 97 compounds with the molecular formula C10H12F3NO4, including Methyl 3-(3-methylazetidin-3-yl)prop-2-ynoate, trifluoroacetic acid, 4-O-Acetyl-1,5-anhydro-2,3,6-trideoxy-3-trifluoroacetamidohex-1-enitol, 1-(4-(Trifluoromethoxy)phenyl)ethan-1-amine carbonate. 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 C10H12F3NO4?
C10H12F3NO4 has a degree of unsaturation of 4. 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.