Tirzepatide and its Impurities
Tirzepatide, sold under the brand name Mounjaro, is an antidiabetic medication used for the treatment of type 2 diabetes. Reference standards of Tirzepatide API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.


(25S,52R)-52-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-25-(tert-butoxycarbonyl)-2,2-dimethyl-4,23,28,37,46-pentaoxo-3,32,35,41,44-pentaoxa-24,29,38,47-tetraazatripentacontan-53-oic Acid
(25S,52R)-52-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-25-(tert-butoxycarbonyl)-2,2-dimethyl-4,23,28,37,46-pentaoxo-3,32,35,41,44-pentaoxa-24,29,38,47-tetraazatripentacontan-53-oic Acid
Catalogue No.:PA PEP 003112
CAS :
NA
Molecular Formula : C66H105N5O16
Molecular Weight : 1224.59


(25S,52S,59S)-52,59-Bis((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-25-(tert-butoxycarbonyl)-2,2-dimethyl-4,23,28,37,46,53-hexaoxo-3,32,35,41,44-pentaoxa-24,29,38,47,54-pentaazahexacontan-60-oic Acid
(25S,52S,59S)-52,59-Bis((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-25-(tert-butoxycarbonyl)-2,2-dimethyl-4,23,28,37,46,53-hexaoxo-3,32,35,41,44-pentaoxa-24,29,38,47,54-pentaazahexacontan-60-oic Acid
Catalogue No.:PA PEP 003114
CAS :
NA
Molecular Formula : C87H127N7O19
Molecular Weight : 1575.00


(25S,52S)-52-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-25-(tert-butoxycarbonyl)-4,23,28,37,46-pentaoxo-3,32,35,41,44-pentaoxa-24,29,38,47-tetraazatripentacontan-53-oic Acid
(25S,52S)-52-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-25-(tert-butoxycarbonyl)-4,23,28,37,46-pentaoxo-3,32,35,41,44-pentaoxa-24,29,38,47-tetraazatripentacontan-53-oic Acid
Catalogue No.:PA PEP 003115
CAS :
NA
Molecular Formula : C64H101N5O16
Molecular Weight : 1196.53


(24S,51S)-51-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-24-(tert-butoxycarbonyl)-2,2-dimethyl-4,22,27,36,45-pentaoxo-3,31,34,40,43-pentaoxa-23,28,37,46-tetraazadopentacontan-52-oic Acid
(24S,51S)-51-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-24-(tert-butoxycarbonyl)-2,2-dimethyl-4,22,27,36,45-pentaoxo-3,31,34,40,43-pentaoxa-23,28,37,46-tetraazadopentacontan-52-oic Acid
Catalogue No.:PA PEP 003116
CAS :
3055106-62-9
Molecular Formula : C65H103N5O16
Molecular Weight : 1210.56


(25S,70S)-70-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-25-(tert-butoxycarbonyl)-2,2-dimethyl-4,23,28,37,46,55,64-heptaoxo-3,32,35,41,44,50,53,59,62-nonaoxa-24,29,38,47,56,65-hexaazahenheptacontan-71-oic Acid
(25S,70S)-70-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-25-(tert-butoxycarbonyl)-2,2-dimethyl-4,23,28,37,46,55,64-heptaoxo-3,32,35,41,44,50,53,59,62-nonaoxa-24,29,38,47,56,65-hexaazahenheptacontan-71-oic Acid
Catalogue No.:PA PEP 003117
CAS :
NA
Molecular Formula : C78H127N7O22
Molecular Weight : 1514.90


(25S,61S)-61-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-25-(tert-butoxycarbonyl)-2,2-dimethyl-4,23,28,37,46,55-hexaoxo-3,32,35,41,44,50,53-heptaoxa-24,29,38,47,56-pentaazadohexacontan-62-oic Acid
(25S,61S)-61-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-25-(tert-butoxycarbonyl)-2,2-dimethyl-4,23,28,37,46,55-hexaoxo-3,32,35,41,44,50,53-heptaoxa-24,29,38,47,56-pentaazadohexacontan-62-oic Acid
Catalogue No.:PA PEP 003118
CAS :
NA
Molecular Formula : C72H116N6O19
Molecular Weight : 1369.74


N2-(((9H-Fluoren-9-yl)methoxy)carbonyl)-N6-((S)-5-(tert-butoxy)-4-(20-(tert-butoxy)-20-oxoicosanamido)-5-oxopentanoyl)-L-lysine
N2-(((9H-Fluoren-9-yl)methoxy)carbonyl)-N6-((S)-5-(tert-butoxy)-4-(20-(tert-butoxy)-20-oxoicosanamido)-5-oxopentanoyl)-L-lysine
Catalogue No.:PA PEP 003119
CAS :
NA
Molecular Formula : C54H83N3O10
Molecular Weight : 934.27


(25S,43S)-43-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-25-(tert-butoxycarbonyl)-2,2-dimethyl-4,23,28,37-tetraoxo-3,32,35-trioxa-24,29,38-triazatetratetracontan-44-oic Acid
(25S,43S)-43-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-25-(tert-butoxycarbonyl)-2,2-dimethyl-4,23,28,37-tetraoxo-3,32,35-trioxa-24,29,38-triazatetratetracontan-44-oic Acid
Catalogue No.:PA PEP 003120
CAS :
2612237-97-3
Molecular Formula : C60H94N4O13
Molecular Weight : 1079.43