Difelikefalin, sold under the brand name Korsuva, is an analgesic opioid peptide used for the treatment of moderate to severe itching. Reference standards of Difelikefalin API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.
Difelikefalin
Catalogue No.:PA 04 2820000
CAS :
Molecular Formula : C36H53N7O6
Molecular Weight : 679.86
4-Amino-4-carboxypiperidine
Catalogue No.:PA 04 2821000
Molecular Formula : C6H12N2O2
Molecular Weight : 144.17
1-(N2-D-phenylalanyl-D-phenylalanyl-D-leucyl-N6-acetyl-D-lysyl)-4-aminopiperidine-4-carboxylic acid
Catalogue No.:PA PEP 001133
Molecular Formula : C38H55N7O7
Molecular Weight : 721.9
1-(Acetyl-D-phenylalanyl-D-phenylalanyl-D-leucyl-D-lysyl)-4-aminopiperidine-4-carboxylic Acid
Catalogue No.:PA PEP 001134
1-(D-Phenylalanyl-D-phenylalanyl-D-leucyl-D-lysyl)-4-acetamidopiperidine-4-carboxylic Acid
Catalogue No.:PA PEP 001135
1-(N2-D-Phenylalanyl-D-phenylalanyl-D-leucyl-N6-acetyl-D-lysyl)-4-acetamidopiperidine-4-carboxylic Acid
Catalogue No.:PA PEP 001136
Molecular Formula : C40H57N7O8
Molecular Weight : 763.94
1-(N6-Acetyl-N2-acetyl-D-phenylalanyl-D-phenylalanyl-D-leucyl-D-lysyl)-4-aminopiperidine-4-carboxylic Acid
Catalogue No.:PA PEP 001137
4-Acetamido-1-(acetyl-D-phenylalanyl-D-phenylalanyl-D-leucyl-D-lysyl)piperidine-4-carboxylic Acid
Catalogue No.:PA PEP 001138
4-Acetamido-1-(N6-acetyl-N2-acetyl-D-phenylalanyl-D-phenylalanyl-D-leucyl-D-lysyl)piperidine-4-carboxylic Acid
Catalogue No.:PA PEP 001139
Molecular Formula : C42H59N7O9
Molecular Weight : 805.97
4-Amino-1-((R)-2-((R)-2-((R)-2-((R)-2-amino-3-phenylpropanamido)-3-phenylpropanamido)-4-methylpentanamido)-6-oxohexanoyl)piperidine-4-carboxylic Acid
Catalogue No.:PA PEP 001140
Molecular Formula : C36H50N6O7
Molecular Weight : 678.83
4-Amino-1-((R)-2-((R)-2-((R)-2-((R)-2-amino-3-phenylpropanamido)-3-phenylpropanamido)-4-methylpentanamido)-5-carboxypentanoyl)piperidine-4-carboxylic Acid
Catalogue No.:PA PEP 001141
Molecular Formula : C36H50N6O8
Molecular Weight : 694.83
D-Phenylalanyl-D-phenylalanyl-D-leucyl-D-lysine
Catalogue No.:PA PEP 001142
Molecular Formula : C30H43N5O5
Molecular Weight : 553.7
1-(D-Lysyl)-4-aminopiperidine-4-carboxylic Acid
Catalogue No.:PA PEP 001143
Molecular Formula : C12H24N4O3
Molecular Weight : 272.35
D-Phenylalanyl-D-leucine
Catalogue No.:PA PEP 001144
Molecular Formula : C15H22N2O3
Molecular Weight : 278.35
D-Phenylalanyl-D-phenylalanyl-D-leucine
Catalogue No.:PA PEP 001145
Molecular Formula : C24H31N3O4
Molecular Weight : 425.53
1-(D-Leucyl-D-lysyl)-4-aminopiperidine-4-carboxylic Acid
Catalogue No.:PA PEP 001146
Molecular Formula : C18H35N5O4
Molecular Weight : 385.51
1-(D-Phenylalanyl-D-leucyl-D-lysyl)-4-aminopiperidine-4-carboxylic Acid
Catalogue No.:PA PEP 001147
Molecular Formula : C27H44N6O5
Molecular Weight : 532.69
D-Phenylalanyl-D-phenylalanine
Catalogue No.:PA PEP 001148
Molecular Formula : C18H20N2O3
Molecular Weight : 312.37
D-Phenylalanyl-D-leucyl-D-lysine
Catalogue No.:PA PEP 001149
Molecular Formula : C21H34N4O4
Molecular Weight : 406.53
1-(N2-D-Phenylalanyl-D-phenylalanyl-D-leucyl-N6-(1-(D-phenylalanyl-D-phenylalanyl-D-leucyl-D-lysyl)-4-aminopiperidine-4-carbonyl)-D-lysyl)-4-aminopiperidine-4-carboxylic Acid
Catalogue No.:PA PEP 001150
Molecular Formula : C72H104N14O11
Molecular Weight : 1341.71
1-(D-Phenylalanyl-D-phenylalanyl-D-leucyl-D-lysyl)-4-(1-(D-phenylalanyl-D-phenylalanyl-D-leucyl-D-lysyl)-4-aminopiperidine-4-carboxamido)piperidine-4-carboxylic Acid
Catalogue No.:PA PEP 001151
1-(N2-D-Phenylalanyl-D-phenylalanyl-D-leucyl-N6-(1-(N2-D-phenylalanyl-D-phenylalanyl-D-leucyl-N6-(1-(D-phenylalanyl-D-phenylalanyl-D-leucyl-D-lysyl)-4-aminopiperidine-4-carbonyl)-D-lysyl)-4-aminopiperidine-4-carbonyl)-D-lysyl)-4-aminopiperidine-4-carboxylic Acid
Catalogue No.:PA PEP 001152
Molecular Formula : C108H155N21O16
Molecular Weight : 2003.56
1-(L-Phenylalanyl-L-phenylalanyl-L-leucyl-L-lysyl)-4-aminopiperidine-4-carboxylic Acid
Catalogue No.:PA PEP 001153
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