Impurity reference standards
Oseltamivir impurities & reference standards
Characterised Oseltamivir impurities, degradation products and related compounds for analytical method development, validation, QC release and regulatory filings.
59reference materials
1isotope-labelled
COAHPLC · NMR · MS on request
Parent API: Oseltamivir
196618-13-0 · C16H28N2O4
![(1R,5R,6R)-5-(1-Ethylpropoxy)-7-azabicyclo[4.1.0]hept-3-ene-3-carboxylic Acid Ethyl Ester chemical structure](/media/structures/HPKPKUHYXGQYRO-JHJVBQTASA-N.svg)
(1R,5R,6R)-5-(1-Ethylpropoxy)-7-azabicyclo[4.1.0]hept-3-ene-3-carboxylic Acid Ethyl Ester
- CAS
- 204255-02-7
- Formula
- C14H23NO3
- MW
- 253.34 g/mol
VQ-032299
![(1R,5R,6R)-5-(1-Ethylpropoxy)-7-oxabicyclo[4.1.0]hept-3-ene-3-carboxylic Acid Ethyl Ester chemical structure](/media/structures/XZXCGRFGEVXWIT-UPJWGTAASA-N.svg)
(1R,5R,6R)-5-(1-Ethylpropoxy)-7-oxabicyclo[4.1.0]hept-3-ene-3-carboxylic Acid Ethyl Ester
- CAS
- 1266663-89-1
- Formula
- C14H22O4
- MW
- 254.32 g/mol
VQ-032298
![(1R,5S,6R)-Rel-5-(1-Ethylpropoxy)-7-oxabicyclo[4.1.0]hept-3-ene-3-carboxylic Acid Ethyl Ester chemical structure](/media/structures/XZXCGRFGEVXWIT-XQQFMLRXSA-N.svg)
(1R,5S,6R)-Rel-5-(1-Ethylpropoxy)-7-oxabicyclo[4.1.0]hept-3-ene-3-carboxylic Acid Ethyl Ester
- CAS
- 347378-74-9
- Formula
- C14H22O4
- MW
- 254.32 g/mol
VQ-038795
![(1R,5S,6S)-Rel-5-(1-Ethylpropoxy)-7-oxabicyclo[4.1.0]hept-3-ene-3-carboxylic Acid Methyl Ester chemical structure](/media/structures/BWNDCLRNSUNXGU-GRYCIOLGSA-N.svg)
(1R,5S,6S)-Rel-5-(1-Ethylpropoxy)-7-oxabicyclo[4.1.0]hept-3-ene-3-carboxylic Acid Methyl Ester
- CAS
- 1234858-94-6
- Formula
- C13H20O4
- MW
- 240.29 g/mol
VQ-038806
![(1S,5S,6S)-Ethyl 5-(pentan-3-yloxy)-7-oxabicyclo[4.1.0]hept-3-ene-3-carboxylate chemical structure](/media/structures/XZXCGRFGEVXWIT-RWMBFGLXSA-N.svg)
(1S,5S,6S)-Ethyl 5-(pentan-3-yloxy)-7-oxabicyclo[4.1.0]hept-3-ene-3-carboxylate
- CAS
- 2413185-88-1
- Formula
- C14H22O4
- MW
- 254.32 g/mol
VQ-032301
![(3R,4R,5R)-3,4-Dihydroxy-5-[(methylsulfonyl)oxy]-1-cyclohexene-1-carboxylic Acid Ethyl Ester chemical structure](/media/structures/XRWVWZDGWXYWDC-IWSPIJDZSA-N.svg)
(3R,4R,5R)-3,4-Dihydroxy-5-[(methylsulfonyl)oxy]-1-cyclohexene-1-carboxylic Acid Ethyl Ester
- CAS
- 220626-12-0
- Formula
- C10H16O7S
- MW
- 280.3 g/mol
VQ-038807
![(3R,4R,5R)-4-(1-Ethylpropoxy)-3-hydroxy-5-[(methylsulfonyl)oxy]-1-cyclohexene-1-carboxylic Acid Ethy chemical structure](/media/structures/CNFGUAGRJCDUDT-MGPQQGTHSA-N.svg)
(3R,4R,5R)-4-(1-Ethylpropoxy)-3-hydroxy-5-[(methylsulfonyl)oxy]-1-cyclohexene-1-carboxylic Acid Ethy
- CAS
- 204254-94-4
- Formula
- C15H26O7S
- MW
- 350.4 g/mol
VQ-032303
(3R,4R,5S)-4-(Acetylamino)-5-amino-3-(1-methylethoxy)-1-Cyclohexene-1-carboxylic Acid Ethyl Ester
- CAS
- 1052063-36-1
- Formula
- C14H24N2O4
- MW
- 284.35 g/mol
VQ-038801
(3R,4R,5S)-Ethyl 4-acetamido-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-enecarboxylate
- CAS
- 651324-09-3
- Formula
- C22H36N2O4
- MW
- 392.5 g/mol
VQ-038865
(3R,4R,5S)-Ethyl-4-acetamido-5-(2-formyl-5-(hydroxymethyl)-1H-pyrrol-1-yl)-3-(pentan-3-yloxy)cyclohex-1-enecarboxylate
- CAS
- 2413185-87-0
- Formula
- C22H32N2O6
- MW
- 420.5 g/mol
VQ-038796
(3R,4S,5R)-Ethyl 5-azido-4-hydroxy-3-(pentan-3-yloxy)cyclohex-1-enecarboxylate
- CAS
- 204254-98-8
- Formula
- C14H23N3O4
- MW
- 297.35 g/mol
VQ-032302
(3S,4R,5S)-Ethyl 4-acetamido-5-amino-2-azido-3-(pentan-3-yloxy)cyclohexanecarboxylate
- CAS
- 3077786-48-9
- Formula
- C16H29N5O4
- MW
- 355.43 g/mol
VQ-043246
![Ethyl (1R,5R,6R)-7-(tert-butyl)-5-(pentan-3-yloxy)-7-azabicyclo[4.1.0]hept-3-ene-3-carboxylate chemical structure](/media/structures/UXYQFYXXRVMJMV-OJEBHDCCSA-N.svg)
Ethyl (1R,5R,6R)-7-(tert-butyl)-5-(pentan-3-yloxy)-7-azabicyclo[4.1.0]hept-3-ene-3-carboxylate
- CAS
- 2417645-75-9
- Formula
- C18H31NO3
- MW
- 309.4 g/mol
VQ-038803
![Ethyl (1S,5R,6R)-5-hydroxy-7-oxabicyclo[4.1.0]hept-3-ene-3-carboxylate chemical structure](/media/structures/UAFHUMBBORXHIV-GJMOJQLCSA-N.svg)
Ethyl (1S,5R,6R)-5-hydroxy-7-oxabicyclo[4.1.0]hept-3-ene-3-carboxylate
- CAS
- 876014-27-6
- Formula
- C9H12O4
- MW
- 184.19 g/mol
VQ-032300
![Ethyl (1S,5R,6S)-5-isopropoxy-7-oxabicyclo[4.1.0]hept-3-ene-3-carboxylate chemical structure](/media/structures/VNIDRCSRWIEVMF-OUAUKWLOSA-N.svg)
Ethyl (1S,5R,6S)-5-isopropoxy-7-oxabicyclo[4.1.0]hept-3-ene-3-carboxylate
- CAS
- 2382442-97-7
- Formula
- C12H18O4
- MW
- 226.27 g/mol
VQ-049355
Ethyl (3R,4R,5S)-4-(N-(tert-butyl)acetamido)-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate hydrochloride
- CAS
- 651324-08-2
- Formula
- C26H45ClN2O4
- MW
- 485.1 g/mol
VQ-038809
Ethyl (3R,4R,5S)-4-(tert-butylamino)-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
- CAS
- 651324-06-0
- Formula
- C24H42N2O3
- MW
- 406.6 g/mol
VQ-038800
Ethyl (3R,4S,5R)-5-(tert-butylamino)-4-hydroxy-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
- CAS
- 651324-04-8
- Formula
- C18H33NO4
- MW
- 327.5 g/mol
VQ-049350
Ethyl (3R,4S,5S)-4-acetamido-5-amino-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
- CAS
- 2413185-95-0
- Formula
- C16H28N2O4
- MW
- 312.4 g/mol
VQ-038805
FAQs — Oseltamivir impurities
Which Oseltamivir impurities do you supply?
We list 59 Oseltamivir-related reference materials, including process impurities, degradation products, stable-isotope-labelled standards and related compounds. Each is supplied with a COA, and characterisation data (HPLC, 1H-NMR, MS, IR) can be provided on request.
What are Oseltamivir impurity standards used for?
They are used for analytical method development and validation, impurity identification and quantification, forced-degradation and stability studies, and to support ANDA, DMF and other regulatory submissions under ICH Q3A/Q3B (and ICH M7 for mutagenic impurities).
Can you synthesise a Oseltamivir impurity that is not listed?
Yes. Our custom synthesis service can prepare and characterise unlisted impurities, metabolites and labelled analogues from milligram to gram scale. Share the structure or name and required quantity for a quotation.
Request Oseltamivir impurity standards
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