oseltamivir and its Impurities
An active metabolite of Oseltamivir, which an antiviral medication sold under the brand name of Tamiflu. It is used to treat and prevent influenza A and influenza B. It is a competitive inhibitor of influenza´s neuraminidase enzyme. Reference standards of Oseltamivir API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.
 
	
			                                   
																				(3R,4R,5S)-Ethyl 4-acetamido-3-(pentan-3-yloxy)-5-(((2R,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)amino)cyclohex-1-enecarboxylate
(3R,4R,5S)-Ethyl 4-acetamido-3-(pentan-3-yloxy)-5-(((2R,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)amino)cyclohex-1-enecarboxylate
- Catalogue No.:PA 15 12620 
- CAS : - NA
- Molecular Formula : C22H38N2O9 
- Molecular Weight : 474.55 
 
	
			                                   
																				(3aS,7aR)-Ethyl 7-hydroxy-2,2-dimethyl-3a,6,7,7a-tetrahydrobenzo[d][1,3]dioxole-5-carboxylate
(3aS,7aR)-Ethyl 7-hydroxy-2,2-dimethyl-3a,6,7,7a-tetrahydrobenzo[d][1,3]dioxole-5-carboxylate
- Catalogue No.:PA 15 12710 
- CAS : - 141781-67-1
- Molecular Formula : C12H18O5 
- Molecular Weight : 242.27 
 
	
			                                   
																				(3aS,7S,7aR)-Methyl 7-hydroxy-2,2-dimethyl-3a,6,7,7a-tetrahydrobenzo[d][1,3]dioxole-5-carboxylate
(3aS,7S,7aR)-Methyl 7-hydroxy-2,2-dimethyl-3a,6,7,7a-tetrahydrobenzo[d][1,3]dioxole-5-carboxylate
- Catalogue No.:PA 15 12720 
- CAS : - 141781-67-1
- Molecular Formula : C11H16O5 
- Molecular Weight : 228.24 
 
	
			                                   
																				(3aR,7S,7aS)-Ethyl 7-hydroxy-2,2-dimethyl-3a,6,7,7a-tetrahydrobenzo[d][1,3]dioxole-5-carboxylate
(3aR,7S,7aS)-Ethyl 7-hydroxy-2,2-dimethyl-3a,6,7,7a-tetrahydrobenzo[d][1,3]dioxole-5-carboxylate
- Catalogue No.:PA 15 12730 
- CAS : - 1446467-13-5
- Molecular Formula : C12H18O5 
- Molecular Weight : 242.27 
 
	
			                                   
																				2-(2-(((1S,5R,6R)-6-Acetamido-3-(ethoxycarbonyl)-5-(pentan-3-yloxy)cyclohex-3-en-1-yl)amino)-2oxoethyl)-2-hydroxysuccinic Acid
2-(2-(((1S,5R,6R)-6-Acetamido-3-(ethoxycarbonyl)-5-(pentan-3-yloxy)cyclohex-3-en-1-yl)amino)-2oxoethyl)-2-hydroxysuccinic Acid
- Catalogue No.:PA 15 12740 
- CAS : - 2738248-86-5
- Molecular Formula : C22H34N2O10 
- Molecular Weight : 486.51 
 
	
			                                   
																				3-(((1S,5R,6R)-6-Acetamido-3-(ethoxycarbonyl)-5-(pentan-3-yloxy)cyclohex-3-en-1yl) carbamoyl)3-hydroxypentanedioic Acid
3-(((1S,5R,6R)-6-Acetamido-3-(ethoxycarbonyl)-5-(pentan-3-yloxy)cyclohex-3-en-1yl) carbamoyl)3-hydroxypentanedioic Acid
- Catalogue No.:PA 15 12750 
- CAS : - 2738248-87-6
- Molecular Formula : C22H34N2O10 
- Molecular Weight : 486.51 
 
	
			                                   
																				(3R,4R,5S)-Ethyl 4-acetamido-3-(pentan-3-yloxy)-5-((((3S,4R,5R)-2,3,4,5-tetrahydroxytetrahydro-2H-pyran-2-yl)methyl)amino)cyclohex-1-enecarboxylate
(3R,4R,5S)-Ethyl 4-acetamido-3-(pentan-3-yloxy)-5-((((3S,4R,5R)-2,3,4,5-tetrahydroxytetrahydro-2H-pyran-2-yl)methyl)amino)cyclohex-1-enecarboxylate
- Catalogue No.:PA 15 12770 
- CAS : - 2413185-85-8
- Molecular Formula : C22H38N2O9 
- Molecular Weight : 474.55 
 
	
			                                   
																				(3R,4R,5S)-Ethyl 4-acetamido-3-(pentan-3-yloxy)-5-((((3S,4S,5R)-2,3,4-trihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)methyl)amino)cyclohex-1-enecarboxylate
(3R,4R,5S)-Ethyl 4-acetamido-3-(pentan-3-yloxy)-5-((((3S,4S,5R)-2,3,4-trihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)methyl)amino)cyclohex-1-enecarboxylate
- Catalogue No.:PA 15 12780 
- CAS : - 2413185-86-9
- Molecular Formula : C22H38N2O9 
- Molecular Weight : 474.55 
 
	
			                                   
																				(3R,4R,5S)-Ethyl 4-acetamido-5-((Z)-((2S,3R,4R,5R)-2,3,4,5,6-pentahydroxyhexylidene)amino)-3-(pentan-3-yloxy)cyclohex-1-enecarboxylate
(3R,4R,5S)-Ethyl 4-acetamido-5-((Z)-((2S,3R,4R,5R)-2,3,4,5,6-pentahydroxyhexylidene)amino)-3-(pentan-3-yloxy)cyclohex-1-enecarboxylate
- Catalogue No.:PA 15 12790 
- CAS : - NA
- Molecular Formula : C22H38N2O9 
- Molecular Weight : 474.55 
 
	
			                                   
																				(3R,4R,5S)-Ethyl 4-acetamido-3-(pentan-3-yloxy)-5-(((3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)amino)cyclohex-1-enecarboxylate
(3R,4R,5S)-Ethyl 4-acetamido-3-(pentan-3-yloxy)-5-(((3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)amino)cyclohex-1-enecarboxylate
- Catalogue No.:PA 15 12810 
- CAS : - NA
- Molecular Formula : C22H38N2O9 
- Molecular Weight : 474.55 
 
	
			                                   
																				N-((1R,3S,4R,5R,11R,12S,13S,14R)-12,13,14-Trihydroxy-8-oxo-5-(pentan-3-yloxy)-9,15-dioxa-2-azatricyclo[9.3.1.13,7]hexadec-6-en-4-yl)acetamide
N-((1R,3S,4R,5R,11R,12S,13S,14R)-12,13,14-Trihydroxy-8-oxo-5-(pentan-3-yloxy)-9,15-dioxa-2-azatricyclo[9.3.1.13,7]hexadec-6-en-4-yl)acetamide
- Catalogue No.:PA 15 12820 
- CAS : - NA
- Molecular Formula : C20H32N2O8 
- Molecular Weight : 428.48 
 
	
			                                   
																				Ethyl (3S,4S,5R)-4-(N-(tert-butyl)acetamido)-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Ethyl (3S,4S,5R)-4-(N-(tert-butyl)acetamido)-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
- Catalogue No.:PA 15 12515 
- CAS : - NA
- Molecular Formula : C26H44N2O4 
- Molecular Weight : 448.65 
 
	
			                                   
																				Ethyl (3R,4R,5S)-5-acetamido-4-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Ethyl (3R,4R,5S)-5-acetamido-4-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
- Catalogue No.:PA 15 12555 
- CAS : - 2254819-34-4
- Molecular Formula : C22H36N2O4 
- Molecular Weight : 392.54 
 
	
			                                   
																				Ethyl (3aR,7R,7aR)-2,2-diethyl-7-((methylsulfonyl)oxy)-3a,4,7,7a-tetrahydrobenzo[d][1,3]dioxole-5-carboxylate
Ethyl (3aR,7R,7aR)-2,2-diethyl-7-((methylsulfonyl)oxy)-3a,4,7,7a-tetrahydrobenzo[d][1,3]dioxole-5-carboxylate
- Catalogue No.:PA 15 12615 
- CAS : - 1642097-30-0
- Molecular Formula : C15H24O7S 
- Molecular Weight : 348.41 
 
	
			                                   
																				(3R,4R,5R)-3-(1-Ethylpropoxy)-4-hydroxy-5-[(methylsulfonyl)oxy]-1-cyclohexene-1-carboxylic Acid Ethyl Ester
(3R,4R,5R)-3-(1-Ethylpropoxy)-4-hydroxy-5-[(methylsulfonyl)oxy]-1-cyclohexene-1-carboxylic Acid Ethyl Ester
- Catalogue No.:PA 15 12880 
- CAS : - 204254-92-2
- Molecular Formula : C15H26O7S 
- Molecular Weight : 350.43 
 
	
			                                   
																				(3R,4R,5R)-4-(1-Ethylpropoxy)-3-hydroxy-5-[(methylsulfonyl)oxy]-1-cyclohexene-1-carboxylic Acid Ethyl Ester
(3R,4R,5R)-4-(1-Ethylpropoxy)-3-hydroxy-5-[(methylsulfonyl)oxy]-1-cyclohexene-1-carboxylic Acid Ethyl Ester
- Catalogue No.:PA 15 12890 
- CAS : - 204254-94-4
- Molecular Formula : C15H26O7S 
- Molecular Weight : 350.43 
 
	
			                                   
																				Ethyl (3R,4S,5R)-5-(tert-butylamino)-4-hydroxy-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Ethyl (3R,4S,5R)-5-(tert-butylamino)-4-hydroxy-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
- Catalogue No.:PA 15 12940 
- CAS : - 651324-04-8
- Molecular Formula : C18H33NO4 
- Molecular Weight : 327.47 
 
	
			                                   
																				Ethyl (1R,5R,6R)-7-(tert-butyl)-5-(pentan-3-yloxy)-7-azabicyclo[4.1.0]hept-3-ene-3-carboxylate
Ethyl (1R,5R,6R)-7-(tert-butyl)-5-(pentan-3-yloxy)-7-azabicyclo[4.1.0]hept-3-ene-3-carboxylate
- Catalogue No.:PA 15 12950 
- CAS : - 2417645-75-9
- Molecular Formula : C18H31NO3 
- Molecular Weight : 309.45 
 
	
			                                   
																				Ethyl (3R,4R,5S)-4-(tert-butylamino)-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Ethyl (3R,4R,5S)-4-(tert-butylamino)-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
- Catalogue No.:PA 15 12960 
- CAS : - 651324-06-0
- Molecular Formula : C24H42N2O3 
- Molecular Weight : 406.61 
 
	
			                                   
																				Ethyl (3R,4S,5R)-5-(N-(tert-butyl)acetamido)-4-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Ethyl (3R,4S,5R)-5-(N-(tert-butyl)acetamido)-4-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
- Catalogue No.:PA 15 12970 
- CAS : - NA
- Molecular Formula : C26H44N2O4 
- Molecular Weight : 448.65 
 
	
			                                   
																				Ethyl (3S,4R,5S)-4-(N-(tert-butyl)acetamido)-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Ethyl (3S,4R,5S)-4-(N-(tert-butyl)acetamido)-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
- Catalogue No.:PA 15 12980 
- CAS : - NA
- Molecular Formula : C26H44N2O4 
- Molecular Weight : 448.65 
 
	
			                                   
																				Ethyl (3R,4S,5R)-4-(N-(tert-butyl)acetamido)-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Ethyl (3R,4S,5R)-4-(N-(tert-butyl)acetamido)-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
- Catalogue No.:PA 15 12990 
- CAS : - 2413185-98-3
- Molecular Formula : C26H44N2O4 
- Molecular Weight : 448.65 
 
	
			                                   
																				Oseltamivir Related Compound A ((3S,4R,5S)-ethyl 4-acetamido-5-amino-2-azido-3-(pentan-3-yloxy)cycl (1479315)
Oseltamivir Related Compound A ((3S,4R,5S)-ethyl 4-acetamido-5-amino-2-azido-3-(pentan-3-yloxy)cycl (1479315)
- Catalogue No.:PA USP1479315 
- CAS : - NA
- Molecular Formula : NA 
- Molecular Weight : NA 
 
	
			                                   
																				Ethyl (3R,4R,5S)-4-acetamido-3-(pentan-3-yloxy)-5-(((3S,4R,5R)-3,4,5-trihydroxy-2-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)amino)cyclohex-1-ene-1-carboxylate
Ethyl (3R,4R,5S)-4-acetamido-3-(pentan-3-yloxy)-5-(((3S,4R,5R)-3,4,5-trihydroxy-2-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)amino)cyclohex-1-ene-1-carboxylate
- Catalogue No.:PA 15 12645 
- CAS : - NA
- Molecular Formula : C22H38N2O9 
- Molecular Weight : 474.55 
 
	
			                                   
																				Ethyl (3R,4R,5S)-4-acetamido-5-(((3S,4S,5R)-3,4-dihydroxy-2,5-bis(hydroxymethyl)tetrahydrofuran-2-yl)amino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Ethyl (3R,4R,5S)-4-acetamido-5-(((3S,4S,5R)-3,4-dihydroxy-2,5-bis(hydroxymethyl)tetrahydrofuran-2-yl)amino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
- Catalogue No.:PA 15 12655 
- CAS : - NA
- Molecular Formula : C22H38N2O9 
- Molecular Weight : 474.55 
 
	
			                                   
																				Ethyl (3R,4R,5S)-4-(N-(tert-butyl)acetamido)-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Ethyl (3R,4R,5S)-4-(N-(tert-butyl)acetamido)-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
- Catalogue No.:PA 15 0121003 
- CAS : - 651324-07-1
- Molecular Formula : C26H44N2O4 
- Molecular Weight : 448.65 
 
	
			                                   
																				Ethyl (3R,4R,5S)-4-(N-(tert-butyl)acetamido)-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate Hydrochloride
Ethyl (3R,4R,5S)-4-(N-(tert-butyl)acetamido)-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate Hydrochloride
- Catalogue No.:PA 15 0121004 
- CAS : - 651324-08-2
- Molecular Formula : C26H45ClN2O4 
- Molecular Weight : 485.11 
 
	
			                                   
																				Ethyl (3R,4R,5S)-4-acetamido-3-(pentan-3-yloxy)-5-((((3S,4R,5R)-2,3,4,5-tetrahydroxytetrahydro-2H-pyran-2-yl)methyl)amino)cyclohex-1-ene-1-carboxylate
Ethyl (3R,4R,5S)-4-acetamido-3-(pentan-3-yloxy)-5-((((3S,4R,5R)-2,3,4,5-tetrahydroxytetrahydro-2H-pyran-2-yl)methyl)amino)cyclohex-1-ene-1-carboxylate
- Catalogue No.:PA 15 0521000 
- CAS : - 2413185-85-8
- Molecular Formula : C22H38N2O9 
- Molecular Weight : 474.55 
 
	
			                                   
																				Ethyl (3R,4S,5S)-4-(N-(tert-butyl)acetamido)-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Ethyl (3R,4S,5S)-4-(N-(tert-butyl)acetamido)-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
- Catalogue No.:PA 15 0521001 
- CAS : - 2413185-97-2
- Molecular Formula : C26H44N2O4 
- Molecular Weight : 448.65 
 
	
			                                   
																				Ethyl (3R,4R,5R)-4-(N-(tert-butyl)acetamido)-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Ethyl (3R,4R,5R)-4-(N-(tert-butyl)acetamido)-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
- Catalogue No.:PA 15 0521002 
- CAS : - 2413185-96-1
- Molecular Formula : C26H44N2O4 
- Molecular Weight : 448.65 
 
	
			                                   
																				2-(2-((5R,6R)-6-Acetamido-3-(ethoxycarbonyl)-5-(pentan-3-yloxy)cyclohex-3-enylamino)-2-oxoethyl)-2-hydroxysuccinic Acid
2-(2-((5R,6R)-6-Acetamido-3-(ethoxycarbonyl)-5-(pentan-3-yloxy)cyclohex-3-enylamino)-2-oxoethyl)-2-hydroxysuccinic Acid
- Catalogue No.:PA 15 0121005 
- CAS : - NA
- Molecular Formula : C22H34N2O10 
- Molecular Weight : 486.52 
 
	
			                                   
																				Ethyl (3R,4R,5R)-5-chloro-4-((methylsulfonyl)oxy)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Ethyl (3R,4R,5R)-5-chloro-4-((methylsulfonyl)oxy)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
- Catalogue No.:PA 15 0521005 
- CAS : - NA
- Molecular Formula : C15H25ClO6S 
- Molecular Weight : 368.87 
 
	
			                                   
																				Ethyl (3R,4R,5S)-4-(tert-butyl(nitroso)amino)-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Ethyl (3R,4R,5S)-4-(tert-butyl(nitroso)amino)-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
- Catalogue No.:PA 15 0521007 
- CAS : - NA
- Molecular Formula : C24H41N3O4 
- Molecular Weight : 435.61 
 
	
			                                   
																				Ethyl 4-acetamido-5-(2-formyl-5-(hydroxymethyl)-1H-pyrrol-1-yl)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Ethyl 4-acetamido-5-(2-formyl-5-(hydroxymethyl)-1H-pyrrol-1-yl)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
- Catalogue No.:PA 15 0521009 
- CAS : - NA
- Molecular Formula : C22H32N2O6 
- Molecular Weight : 420.51 

 
																				 
																				 
																				 
																				![(1R,5R,6R)-5-(1-Ethylpropoxy)-7-azabicyclo[4.1.0]h PA 15 12560](https://www.pharmaffiliates.com/pimages/PA1512560.jpg) 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				![(1S,5R,6S)-5-(Pentan-3-yloxy)-7-oxabicyclo[4.1.0]h PA 15 0521011](https://www.pharmaffiliates.com/pimages/PA150521011.jpg) 
																				 
 
 
 
