
Chemical identity
Fosaprepitant Dimeglumine Impurity D
CAS not listed · C23H22F7N4O6P.2C7H17NO5
01Identity
Identifiers and names for this exact compound. Empty fields are left unassigned.
| Lazychem ID | LC-31837 |
|---|---|
| PubChem CID | 171379976 |
| Name | Fosaprepitant Dimeglumine Impurity D |
| CAS RN | Not listed |
| Molecular formula | C23H22F7N4O6P.2C7H17NO5 |
| Molecular weight | 614.41 2*195.22 g/mol |
| IUPAC name | (2R, 3R, 4R, 5S)-6-(methylamino)hexane-1, 2, 3, 4, 5-pentaol hemi((3-(((2R, 3S)-2-((S)-1-(3, 5-bis(trifluoromethyl)phenyl)ethoxy)-3-(4-fluorophenyl)morpholino)methyl)-5-oxo-4, 5-dihydro-1H-1, 2, 4-triazol-1-yl)phosphonate) |
| InChIKey | VRQHBYGYXDWZDL-ZQIAVWTLSA-N |
02Structure identifiers

Structure facts for this exact identity.
| Molecular formula | C23H22F7N4O6P.2C7H17NO5 |
|---|---|
| InChIKey | VRQHBYGYXDWZDL-ZQIAVWTLSA-N |
| Ring count | 4 |
| Defined stereocentres | 11 |
| Unassigned stereocentres | 0 |
| SMILES | C[C@@H](C1=CC(=CC(=C1)C(F)(F)F)C(F)(F)F)O[C@@H]2[C@@H](N(CCO2)CC3=NN(C(=O)N3)P(=O)(O)O)C4=CC=C(C=C4)F.CNC[C@@H]([C@H]([C@@H]([C@@H](CO)O)O)O)O.CNC[C@@H]([C@H]([C@@H]([C@@H](CO)O)O)O)O |
|---|---|
| InChI | InChI=1S/C23H22F7N4O6P.2C7H17NO5/c1-12(14-8-15(22(25,26)27)10-16(9-14)23(28,29)30)40-20-19(13-2-4-17(24)5-3-13)33(6-7-39-20)11-18-31-21(35)34(32-18)41(36,37)38;2*1-8-2-4(10)6(12)7(13)5(11)3-9/h2-5,8-10,12,19-20H,6-7,11H2,1H3,(H,31,32,35)(H2,36,37,38);2*4-13H,2-3H2,1H3/t12-,19-,20+;2*4-,5+,6+,7+/m000/s1 |
03Stereochemistry
The published structure contains 11 defined and 0 unassigned tetrahedral stereocentres. The exact wedge-and-dash depiction is shown above.
Published same-connectivity configurations
1 recordThese records have the same connectivity, molecular formula and protonation layer, but a different complete InChIKey stereochemical layer. Only separately structure-linked records are shown.

No additional structure-linked configuration with the same connectivity is currently present in the LazyChem dataset.
Scope: The mathematical 2^n value is only an upper bound. Symmetry and other stereogenic elements can change the number of distinct stereoisomers. A hypothetical configuration is not published as a compound record without a verified structure identity.
04Possible N-nitroso structures
A record-level structural review indicates a possible N-nitroso candidate. This is not a confirmed impurity, formation prediction or analytical finding.
A structural result alone does not establish that a nitrosamine forms. A process-specific and analytical assessment is required.
05India status for this compound
These results apply only to this exact compound name and CAS number. Confirm the current official instruments before making a regulatory decision.
| NDPS / RCS | NOT FOUND IN REVIEWED ENTRIES | No CAS number is available for an exact comparison. Generic and analogue entries were not evaluated. |
|---|---|---|
| SCOMET | NOT FOUND IN REVIEWED CAS ENTRIES | No CAS number is available for an exact comparison. Generic and analogue entries were not evaluated. |
- Narcotic Drugs and Psychotropic Substances Act, 1985, ScheduleDepartment of Revenue, Government of India · source version 1985-09-16
- Controlled-substances notifications and amendmentsDepartment of Revenue, Government of India · source version 2026-03-11
- Appendix 3, SCOMET ListDirectorate General of Foreign Trade, Government of India · source version 2024-09-02
06Names and relationships
Associated parent compound
Fosaprepitant
View API and impurity familyOther names
- Fosaprepitant Impurity 51
07Documented history
Dated discovery, occurrence, use and issue claims are published only when a suitable primary or government source is available.
No verified discovery, first report, occurrence, use or issue event is currently available for this identity.
08Sources
- S01PubChem compound record, CID 171379976
Names and machine-readable chemical identity properties.
- S02NCBI website and molecular data policies
Reuse policy for NCBI molecular data. This page does not reproduce vendor descriptions or contributed narrative text.
- S03Narcotic Drugs and Psychotropic Substances Act, 1985, Schedule
Department of Revenue, Government of India. Used for the exact-compound India status shown on this page.
- S04Controlled-substances notifications and amendments
Department of Revenue, Government of India. Used for the exact-compound India status shown on this page.
- S05Appendix 3, SCOMET List
Directorate General of Foreign Trade, Government of India. Used for the exact-compound India status shown on this page.
