Molecular formula
C25H23N3O5
178 compounds have this formula on CompoundList.
- Molar mass
- 445.48g/mol
- Monoisotopic mass
- 445.1638Da
- Atoms
- 56
- Elements
- 4
- Rings plus double bonds
- 16
The formula C25H23N3O5 describes a molecule made of 25 carbon atoms, 23 hydrogen atoms, 3 nitrogen atoms and 5 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 × 2567.41%12.011 × 25 = 300.275 g/mol
- H Hydrogen × 235.20%1.008 × 23 = 23.184 g/mol
- N Nitrogen × 39.43%14.007 × 3 = 42.021 g/mol
- O Oxygen × 517.96%15.999 × 5 = 79.995 g/mol
Look up another formula
Compounds with the formula C25H23N3O5
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 101 to 178 of 178 compounds
![4-[(Cyanomethyl)(prop-2-yn-1-yl)carbamoyl]-4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanoic acid chemical structure, C25H23N3O5, CAS 2171594-21-9](/s/JJTGLMJOGNVSKM-UHFFFAOYSA-N.svg)
4-[(Cyanomethyl)(prop-2-yn-1-yl)carbamoyl]-4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanoic acid
CAS 2171594-21-9C25H23N3O5
![(3S)-3-{[6-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)pyridin-2-yl]formamido}butanoic acid chemical structure, C25H23N3O5, CAS 2171226-33-6](/s/VDUMHQSRJOXWIC-HNNXBMFYSA-N.svg)
(3S)-3-{[6-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)pyridin-2-yl]formamido}butanoic acid
CAS 2171226-33-6C25H23N3O5
![5-[(3S)-3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)butanamido]pyridine-3-carboxylic acid chemical structure, C25H23N3O5, CAS 2171254-31-0](/s/AKVSIIUXAMSXHG-HNNXBMFYSA-N.svg)
5-[(3S)-3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)butanamido]pyridine-3-carboxylic acid
CAS 2171254-31-0C25H23N3O5
![(2S)-2-({2-[({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)methyl]pyridin-4-yl}formamido)propanoic acid chemical structure, C25H23N3O5, CAS 2171178-78-0](/s/VBOQISZFMVFYMX-HNNXBMFYSA-N.svg)
(2S)-2-({2-[({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)methyl]pyridin-4-yl}formamido)propanoic acid
CAS 2171178-78-0C25H23N3O5
![5-[(2S)-2-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)butanamido]pyridine-2-carboxylic acid chemical structure, C25H23N3O5, CAS 2171233-98-8](/s/VTNWGSSJWFOYNG-NRFANRHFSA-N.svg)
5-[(2S)-2-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)butanamido]pyridine-2-carboxylic acid
CAS 2171233-98-8C25H23N3O5
![3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)-3-[(6-methylpyridin-3-yl)carbamoyl]propanoic acid chemical structure, C25H23N3O5, CAS 2171691-70-4](/s/VTFOOMWNMUFSGT-UHFFFAOYSA-N.svg)
3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)-3-[(6-methylpyridin-3-yl)carbamoyl]propanoic acid
CAS 2171691-70-4C25H23N3O5
![5-{[2-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)propanamido]methyl}pyridine-2-carboxylic acid chemical structure, C25H23N3O5, CAS 2171730-59-7](/s/BXBFEWSHYIIUCQ-UHFFFAOYSA-N.svg)
5-{[2-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)propanamido]methyl}pyridine-2-carboxylic acid
CAS 2171730-59-7C25H23N3O5
![(2R)-2-{[6-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)pyridin-2-yl]formamido}butanoic acid chemical structure, C25H23N3O5, CAS 2171195-73-4](/s/RAQXXIALOXMRFV-HXUWFJFHSA-N.svg)
(2R)-2-{[6-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)pyridin-2-yl]formamido}butanoic acid
CAS 2171195-73-4C25H23N3O5
![(2S)-2-{1-[6-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)pyridin-2-yl]-N-methylformamido}propanoic acid chemical structure, C25H23N3O5, CAS 2171218-22-5](/s/UDASOLHJDWEMGC-HNNXBMFYSA-N.svg)
(2S)-2-{1-[6-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)pyridin-2-yl]-N-methylformamido}propanoic acid
CAS 2171218-22-5C25H23N3O5
![3-{[5-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)pyridin-2-yl]formamido}-2-methylpropanoic acid chemical structure, C25H23N3O5, CAS 2172204-27-0](/s/SMAQMGKZCWUGKV-UHFFFAOYSA-N.svg)
3-{[5-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)pyridin-2-yl]formamido}-2-methylpropanoic acid
CAS 2172204-27-0C25H23N3O5
![3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)-3-[(5-methylpyridin-3-yl)carbamoyl]propanoic acid chemical structure, C25H23N3O5, CAS 2171754-95-1](/s/REMQPFVYMQSVHL-UHFFFAOYSA-N.svg)
3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)-3-[(5-methylpyridin-3-yl)carbamoyl]propanoic acid
CAS 2171754-95-1C25H23N3O5
![5-[3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)-2-methylpropanamido]pyridine-3-carboxylic acid chemical structure, C25H23N3O5, CAS 2171840-55-2](/s/JCDVQIPZUWOKMP-UHFFFAOYSA-N.svg)
5-[3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)-2-methylpropanamido]pyridine-3-carboxylic acid
CAS 2171840-55-2C25H23N3O5
![5-[4-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)butanamido]pyridine-3-carboxylic acid chemical structure, C25H23N3O5, CAS 2171840-65-4](/s/VXKXRFQXAQVRAW-UHFFFAOYSA-N.svg)
5-[4-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)butanamido]pyridine-3-carboxylic acid
CAS 2171840-65-4C25H23N3O5
![5-[3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)butanamido]pyridine-3-carboxylic acid chemical structure, C25H23N3O5, CAS 2171840-75-6](/s/AKVSIIUXAMSXHG-UHFFFAOYSA-N.svg)
5-[3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)butanamido]pyridine-3-carboxylic acid
CAS 2171840-75-6C25H23N3O5
![3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)-3-[(6-methylpyridin-2-yl)carbamoyl]propanoic acid chemical structure, C25H23N3O5, CAS 2171661-43-9](/s/YGHKDZIWRNFUMM-UHFFFAOYSA-N.svg)
3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)-3-[(6-methylpyridin-2-yl)carbamoyl]propanoic acid
CAS 2171661-43-9C25H23N3O5
![3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)-3-{[(pyridin-2-yl)methyl]carbamoyl}propanoic acid chemical structure, C25H23N3O5, CAS 2171722-62-4](/s/HVGRDMUANMAVIO-UHFFFAOYSA-N.svg)
3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)-3-{[(pyridin-2-yl)methyl]carbamoyl}propanoic acid
CAS 2171722-62-4C25H23N3O5
![4-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)-4-[(pyridin-2-yl)carbamoyl]butanoic acid chemical structure, C25H23N3O5, CAS 2171698-54-5](/s/KOTHUZNYWOQHEY-UHFFFAOYSA-N.svg)
4-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)-4-[(pyridin-2-yl)carbamoyl]butanoic acid
CAS 2171698-54-5C25H23N3O5
![3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)-3-[(3-methylpyridin-4-yl)carbamoyl]propanoic acid chemical structure, C25H23N3O5, CAS 2171699-70-8](/s/QTIGXGCMJUXVTJ-UHFFFAOYSA-N.svg)
3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)-3-[(3-methylpyridin-4-yl)carbamoyl]propanoic acid
CAS 2171699-70-8C25H23N3O5
![5-[(2S)-2-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)butanamido]pyridine-3-carboxylic acid chemical structure, C25H23N3O5, CAS 2171145-16-5](/s/VDXIBOIXBHJWDY-QFIPXVFZSA-N.svg)
5-[(2S)-2-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)butanamido]pyridine-3-carboxylic acid
CAS 2171145-16-5C25H23N3O5
![2-{[5-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)pyridin-2-yl]formamido}-2-methylpropanoic acid chemical structure, C25H23N3O5, CAS 2172319-87-6](/s/LWPXNBYMXGBKLI-UHFFFAOYSA-N.svg)
2-{[5-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)pyridin-2-yl]formamido}-2-methylpropanoic acid
CAS 2172319-87-6C25H23N3O5
![3-{1-[5-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)pyridin-2-yl]-N-methylformamido}propanoic acid chemical structure, C25H23N3O5, CAS 2172144-85-1](/s/BMNYBODZKACUOR-UHFFFAOYSA-N.svg)
3-{1-[5-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)pyridin-2-yl]-N-methylformamido}propanoic acid
CAS 2172144-85-1C25H23N3O5
![5-{[3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)propanamido]methyl}pyridine-2-carboxylic acid chemical structure, C25H23N3O5, CAS 2171950-12-0](/s/PCESLPCEYKGHHI-UHFFFAOYSA-N.svg)
5-{[3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)propanamido]methyl}pyridine-2-carboxylic acid
CAS 2171950-12-0C25H23N3O5
![2-{N-Ethyl-1-[5-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pyridin-2-yl]formamido}acetic acid chemical structure, C25H23N3O5, CAS 2171941-84-5](/s/WSOBMPZEQRTNNY-UHFFFAOYSA-N.svg)
2-{N-Ethyl-1-[5-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pyridin-2-yl]formamido}acetic acid
CAS 2171941-84-5C25H23N3O5
![5-[2-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)-2-methylpropanamido]pyridine-2-carboxylic acid chemical structure, C25H23N3O5, CAS 2171951-53-2](/s/HZHGVMWWRXCQFL-UHFFFAOYSA-N.svg)
5-[2-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)-2-methylpropanamido]pyridine-2-carboxylic acid
CAS 2171951-53-2C25H23N3O5
- 5-[3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)butanamido]pyridine-2-carboxylic acid2172276-21-8C25H23N3O5
- 2-{2-[5-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)pyridin-2-yl]-N-methylacetamido}acetic acid2172204-99-6C25H23N3O5
- 2-{5-[2-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)propanamido]pyridin-2-yl}acetic acid2171703-36-7C25H23N3O5
- (2R)-2-{2-[5-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)pyridin-2-yl]acetamido}propanoic acid2171218-53-2C25H23N3O5
- 3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)-3-[(2-methylpyridin-4-yl)carbamoyl]propanoic acid2171732-39-9C25H23N3O5
- 2-{[3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)propanamido]methyl}pyridine-4-carboxylic acid2172305-51-8C25H23N3O5
- 2-{[2-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)propanamido]methyl}pyridine-4-carboxylic acid2171709-68-3C25H23N3O5
- 2-{[3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)pyridin-2-yl]formamido}-2-methylpropanoic acid2172206-99-2C25H23N3O5
- 3-({2-[({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)methyl]pyridin-4-yl}formamido)propanoic acid2172240-36-5C25H23N3O5
- 5-[(2R)-2-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)butanamido]pyridine-2-carboxylic acid2171168-83-3C25H23N3O5
- (2S)-2-{1-[5-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)pyridin-2-yl]-N-methylformamido}propanoic acid2171285-17-7C25H23N3O5
- 5-[4-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)butanamido]pyridine-2-carboxylic acid2172344-67-9C25H23N3O5
- 4-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)-4-[(pyridin-4-yl)carbamoyl]butanoic acid2171516-65-5C25H23N3O5
- 3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)-3-{[(pyridin-3-yl)methyl]carbamoyl}propanoic acid2171582-42-4C25H23N3O5
- 2-{N-Ethyl-1-[6-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pyridin-2-yl]formamido}acetic acid2172003-09-5C25H23N3O5
- 5-[(3S)-3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)butanamido]pyridine-2-carboxylic acid2171210-47-0C25H23N3O5
- (3S)-3-{[3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)pyridin-2-yl]formamido}butanoic acid2171286-61-4C25H23N3O5
- (3S)-3-{[5-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)pyridin-2-yl]formamido}butanoic acid2171244-21-4C25H23N3O5
- 2-{N-Ethyl-1-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pyridin-2-yl]formamido}acetic acid2172552-88-2C25H23N3O5
- 2-{5-[(2S)-2-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)propanamido]pyridin-2-yl}acetic acid2171149-28-1C25H23N3O5
- (3R)-3-{[3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)pyridin-2-yl]formamido}butanoic acid2171186-17-5C25H23N3O5
- 4-[5-Cyano-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pentanamido]but-2-ynoic acid2171480-26-3C25H23N3O5
- 3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)-3-[(4-methylpyridin-2-yl)carbamoyl]propanoic acid2171620-48-5C25H23N3O5
- (2R)-2-({2-[({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)methyl]pyridin-4-yl}formamido)propanoic acid2171185-28-5C25H23N3O5
- 5-[2-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)butanamido]pyridine-2-carboxylic acid2171774-80-2C25H23N3O5
- 2-{5-[3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)propanamido]pyridin-2-yl}acetic acid2172265-38-0C25H23N3O5
- 5-[2-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)-2-methylpropanamido]pyridine-3-carboxylic acid2172500-66-0C25H23N3O5
- (2R)-2-{[3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)pyridin-2-yl]formamido}butanoic acid2171255-69-7C25H23N3O5
- 3-{[6-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)pyridin-2-yl]formamido}butanoic acid2171947-41-2C25H23N3O5
- 2-{5-[(2R)-2-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)propanamido]pyridin-2-yl}acetic acid2171250-15-8C25H23N3O5
- 4-{[5-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)pyridin-2-yl]formamido}butanoic acid2172188-89-3C25H23N3O5
- 3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)-3-[(2-methylpyridin-3-yl)carbamoyl]propanoic acid2171737-62-3C25H23N3O5
- 5-[2-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)butanamido]pyridine-3-carboxylic acid2171701-38-3C25H23N3O5
- 3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)-3-[(4-methylpyridin-3-yl)carbamoyl]propanoic acid2171698-62-5C25H23N3O5
- 3-{[6-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)pyridin-2-yl]formamido}-2-methylpropanoic acid2171847-38-2C25H23N3O5
- 2-{[(2R)-2-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)propanamido]methyl}pyridine-4-carboxylic acid2171178-83-7C25H23N3O5
- 3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)-3-[(5-methylpyridin-2-yl)carbamoyl]propanoic acid2171516-47-3C25H23N3O5
- 5-[(2R)-2-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)butanamido]pyridine-3-carboxylic acid2171145-11-0C25H23N3O5
- 3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)-3-[methyl(pyridin-4-yl)carbamoyl]propanoic acid2171633-11-5C25H23N3O5
- 2-(1-{2-[({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)methyl]pyridin-4-yl}-N-methylformamido)acetic acid2172147-53-2C25H23N3O5
- 3-{[3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)pyridin-2-yl]formamido}-2-methylpropanoic acid2172157-73-0C25H23N3O5
- 3-{1-[3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)pyridin-2-yl]-N-methylformamido}propanoic acid2172157-82-1C25H23N3O5
- 3-{[3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)pyridin-2-yl]formamido}butanoic acid2172468-06-1C25H23N3O5
- (2S)-2-{[3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)pyridin-2-yl]formamido}butanoic acid2171139-55-0C25H23N3O5
- 2-{[(2S)-2-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)propanamido]methyl}pyridine-4-carboxylic acid2171232-67-8C25H23N3O5
- (2S)-2-{1-[3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)pyridin-2-yl]-N-methylformamido}propanoic acid2171233-66-0C25H23N3O5
- 3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)-3-[methyl(pyridin-3-yl)carbamoyl]propanoic acid2171620-92-9C25H23N3O5
- 5-{[(2R)-2-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)propanamido]methyl}pyridine-2-carboxylic acid2171262-01-2C25H23N3O5
- (2R)-2-{[5-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)pyridin-2-yl]formamido}butanoic acid2171201-48-0C25H23N3O5
- 3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)-3-[(3-methylpyridin-2-yl)carbamoyl]propanoic acid2171598-88-0C25H23N3O5
- (3R)-3-{[5-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)pyridin-2-yl]formamido}butanoic acid2171235-63-3C25H23N3O5
- 3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)-3-{[(pyridin-4-yl)methyl]carbamoyl}propanoic acid2171661-80-4C25H23N3O5
- 2-({[2-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)-5-methylphenyl]carbamoyl}amino)acetic acid2580234-19-9C25H23N3O5
- 5-({[(9H-Fluoren-9-yl)methoxy]carbonyl}(oxan-4-yl)amino)pyrazine-2-carboxylic acid2680777-22-2C25H23N3O5
Frequently asked questions
What is the molar mass of C25H23N3O5?
The molar mass of C25H23N3O5 is 445.48 g/mol, calculated from standard atomic weights for 25 carbon atoms, 23 hydrogen atoms, 3 nitrogen atoms and 5 oxygen atoms. The monoisotopic mass is 445.1638 Da.
How many compounds have the formula C25H23N3O5?
CompoundList lists 178 compounds with the molecular formula C25H23N3O5, including 4-[(Cyanomethyl)(prop-2-yn-1-yl)carbamoyl]-4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanoic acid, (3S)-3-{[6-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)pyridin-2-yl]formamido}butanoic acid, 5-[(3S)-3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)butanamido]pyridine-3-carboxylic 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 C25H23N3O5?
C25H23N3O5 has a degree of unsaturation of 16. 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.