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Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for Nirmatrelvir, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our Nirmatrelvir impurity reference standards are invaluable for pharmaceutical research, supporting product development, ANDA and DMF submissions, quality control (QC), method validation, and stability studies. They also aid in identifying unknown impurities and assessing genotoxic potential.
Our Nirmatrelvir-related products undergo thorough characterization and are supplied with detailed Certificates of Analysis (COA) and analytical data that meet regulatory requirements. All supplied products are re-tested at regular intervals to ensure ongoing quality and compliance.

Nirmatrelvir Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Nirmatrelvir-D6 Stable Isotopes CS-O-41606 2628280-40-8 (unalebeled) Enquire
Nirmatrelvir-d9 Stable Isotopes CS-O-40426 2628280-40-8 (Unlabeled) In Stock


API

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Nirmatrelvir API CS-O-39891 2628280-40-8 In Stock


Metabolite

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Nirmatrelvir M8 Metabolite CS-O-41062 Not Available Enquire
Nirmatrelvir Metabolite (M1) Metabolite CS-O-47343 Not Available Enquire
Nirmatrelvir Metabolite (M2) Metabolite CS-O-47344 Not Available Enquire
Nirmatrelvir Metabolite (M3) Metabolite CS-O-47345 Not Available Enquire
Nirmatrelvir Metabolite (M4) Metabolite CS-O-47346 Not Available Enquire


Impurity

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(R)-2-amino-3-((R)-2-oxopyrrolidin-3-yl)propanamide hydrochl... Impurity CS-O-42911 Not Available Enquire
(S)​-​2-​amino-​3-​((S)​-​2-​oxopyrrolidin-​3-​yl)​propanami... Impurity CS-O-44562 2628280-47-5 Enquire
(S)-2-amino-3-((R)-2-oxopyrrolidin-3-yl)propanamide hydrochl... Impurity CS-O-42913 Not Available Enquire
methyl (1S,2R,5R)-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-c... Impurity CS-O-48553 943516-62-9 Enquire
Nirmatrelvi R isomer Impurity CS-O-42621 Not Available Enquire
Nirmatrelvir Acid impurity Impurity CS-O-41105 Not Available Enquire
Nirmatrelvir Amide Impurity CS-O-40554 2755812-81-6 In Stock
Nirmatrelvir Boc Impurity Impurity CS-O-47508 2755812-78-1 In Stock
Nirmatrelvir Chloro impurity Impurity CS-O-41103 Not Available Enquire
Nirmatrelvir Enantiomer impurity Impurity CS-O-42620 Not Available Enquire
Nirmatrelvir Impurity 10 Impurity CS-O-41065 1027601-37-1 Enquire
Nirmatrelvir Impurity 11 Impurity CS-O-41066 Not Available Enquire
Nirmatrelvir Impurity 12 Impurity CS-O-41067 2755950-35-5 Enquire
Nirmatrelvir Impurity 23 Impurity CS-EO-03729 2920198-06-5 Enquire
Nirmatrelvir Impurity 9 Impurity CS-O-41064 Not Available Enquire
Nirmatrelvir Impurity A Impurity CS-EO-01835 2628280-48-6 Enquire
Nirmatrelvir Impurity C Impurity CS-EO-03211 Not Available In Stock
Nirmatrelvir Isomer 1 Impurity CS-O-42142 Not Available Enquire
Nirmatrelvir Isomer 2 Impurity CS-O-42143 Not Available Enquire
Nirmatrelvir Isomer I Impurity CS-O-53212 ---- Enquire
Nirmatrelvir Isopropyl ester Impurity CS-O-41104 Not Available Enquire
NIRMATRELVIR KSM I IMPURITY A (ACID IMPURITY) Impurity CS-O-48781 394735-37-6 Enquire
NIRMATRELVIR KSM II IMPURITY A Impurity CS-O-48782 1429218-41-6 Enquire
Nirmatrelvir Methyl Ester Impurity CS-O-40555 2879641-46-8 In Stock
Nirmatrelvir R isomer (Tert-Butyl) Impurity CS-O-51804 Not Available Enquire
Nirmatrelvir R-isomer(CN) Impurity CS-O-41102 2755812-41-8 In Stock
Nirmatrelvir Side Chain Impurity 1 Impurity CS-O-43098 Not Available Enquire
(3R,5aS,6aR,6bS)-6,6-dimethyl-3-phenyltetrahydro-1H-cyclopro... Impurity CS-O-41605 219753-99-8 Enquire
N-((S)-1-((1R,2S,5S)-2-cyano-6,6-dimethyl-3-azabicyclo[3.1.0... Impurity CS-O-41106 Not Available Enquire
Nirmatrelvir Di-Trifluoroacetyl impurity Impurity CS-O-43099 Not Available Enquire


Intermediate

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Nirmatrelvir Boc Intermediate Intermediate CS-O-47513 2628280-40-8 In Stock


Fine Chemicals

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
6,6-Dimethyl-3-azabicyclo[3.1.0]hexane Fine Chemicals CS-DJ-00398 943516-54-9 Enquire