Peptides and its Impurities
Peptides are naturally occurring biological macromolecules formed by the linear arrangement of two or more amino acids linked together by peptide bonds. It can be used as biomarkers for disease detection and diagnosis. Reference standards of Peptides API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.


((S)-5-Oxopyrrolidine-2-carbonyl)-L-histidyl-L-tryptophyl-L-seryl-L-tyrosylglycyl-L-leucyl-L-arginyl-L-prolylglycine
((S)-5-Oxopyrrolidine-2-carbonyl)-L-histidyl-L-tryptophyl-L-seryl-L-tyrosylglycyl-L-leucyl-L-arginyl-L-prolylglycine
Catalogue No.:PA PEP 000146
CAS :
35263-73-1
Molecular Formula : C55H74N16O14
Molecular Weight : 1183.3


N-((S)-1-Amino-1-oxopropan-2-yl)-1-((2S,8R,11S,14S,17R,20R)-20-(4-chlorobenzyl)-2,8-bis(4-((E)-2,3-diethylguanidino)butyl)-11-(4-hydroxybenzyl)-14-(hydroxymethyl)-5-isobutyl-4,7,10,13,16,19,22-heptaoxo-17-(pyridin-3-ylmethyl)-3,6,9,12,15,18,21-heptaazatricosan-1-oyl)pyrrolidine-2-carboxamide
N-((S)-1-Amino-1-oxopropan-2-yl)-1-((2S,8R,11S,14S,17R,20R)-20-(4-chlorobenzyl)-2,8-bis(4-((E)-2,3-diethylguanidino)butyl)-11-(4-hydroxybenzyl)-14-(hydroxymethyl)-5-isobutyl-4,7,10,13,16,19,22-heptaoxo-17-(pyridin-3-ylmethyl)-3,6,9,12,15,18,21-heptaazatricosan-1-oyl)pyrrolidine-2-carboxamide
Catalogue No.:PA PEP 000205
CAS :
NA
Molecular Formula : C67H102ClN17O12
Molecular Weight : 1373.09


(4R,7R,10R,13S,16S)-16-(4-(tert-Butoxy)benzyl)-7-(4-chlorobenzyl)-13-(isopropoxymethyl)-4-(naphthalen-2-ylmethyl)-2,5,8,11,14-pentaoxo-10-(pyridin-3-ylmethyl)-12-oxa-3,6,9,15-tetraazaheptadecan-17-oic Acid
(4R,7R,10R,13S,16S)-16-(4-(tert-Butoxy)benzyl)-7-(4-chlorobenzyl)-13-(isopropoxymethyl)-4-(naphthalen-2-ylmethyl)-2,5,8,11,14-pentaoxo-10-(pyridin-3-ylmethyl)-12-oxa-3,6,9,15-tetraazaheptadecan-17-oic Acid
Catalogue No.:PA PEP 000206
CAS :
NA
Molecular Formula : C51H58ClN5O10
Molecular Weight : 936.49


tert-Butyl ((3Z,10S,16R,22Z)-10-(2-(((R)-1-amino-1-oxopropan-2-yl)carbamoyl)pyrrolidine-1-carbonyl)-4,22-bis(ethylamino)-13-isobutyl-12,15-dioxo-3,5,11,14,21,23-hexaazapentacosa-3,22-dien-16-yl)carbamate
tert-Butyl ((3Z,10S,16R,22Z)-10-(2-(((R)-1-amino-1-oxopropan-2-yl)carbamoyl)pyrrolidine-1-carbonyl)-4,22-bis(ethylamino)-13-isobutyl-12,15-dioxo-3,5,11,14,21,23-hexaazapentacosa-3,22-dien-16-yl)carbamate
Catalogue No.:PA PEP 000207
CAS :
NA
Molecular Formula : C41H78N12O7
Molecular Weight : 851.13


(S)-2-((S)-2-((R)-2-Acetamido-3-(naphthalen-2-yl)propanamido)-3-(4-chlorophenyl)propanamido)-3-(pyridin-3-yl)propanoic Acid
(S)-2-((S)-2-((R)-2-Acetamido-3-(naphthalen-2-yl)propanamido)-3-(4-chlorophenyl)propanamido)-3-(pyridin-3-yl)propanoic Acid
Catalogue No.:PA PEP 000210
CAS :
NA
Molecular Formula : C32H31ClN4O5
Molecular Weight : 587.07