Linkers (Miscellaneous) and its Impurities
Linkers, also referred to as spacers, are molecules or segments of molecules that connect two or more functional units within a larger molecular structure or complex. Reference standards of Linkers (Miscellaneous) API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.
 
	
			                                   
																				Propanoic acid, 3-[(23-azido-3,6,9,12,15,18,21-heptaoxatricos-1-yl)oxy]-, 2,5-dioxo-1-pyrrolidinyl ester
Propanoic acid, 3-[(23-azido-3,6,9,12,15,18,21-heptaoxatricos-1-yl)oxy]-, 2,5-dioxo-1-pyrrolidinyl ester
- Catalogue No.:PA 27 0030232 
- CAS : - 1204834-00-3
- Molecular Formula : C23H40N4O12 
- Molecular Weight : 564.59 
 
	
			                                   
																				N-ethyl-N-isopropylpropan-2-amine 5,21-dioxo-25-((3aS,4S,6aR)-2-oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl)-10,13,16-trioxa-6,20-diazapentacosanoate
N-ethyl-N-isopropylpropan-2-amine 5,21-dioxo-25-((3aS,4S,6aR)-2-oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl)-10,13,16-trioxa-6,20-diazapentacosanoate
- Catalogue No.:PA 27 0030929 
- CAS : - 1205744-09-7
- Molecular Formula : C33H63N5O8S 
- Molecular Weight : 689.95 
 
	
			                                   
																				5,8,11,14,17,20,23,26,29,32,35-Undecaoxa-2-azaheptatriacontanoic acid, 37-amino-, 1,1-dimethylethyl ester
5,8,11,14,17,20,23,26,29,32,35-Undecaoxa-2-azaheptatriacontanoic acid, 37-amino-, 1,1-dimethylethyl ester
- Catalogue No.:PA 27 0030247 
- CAS : - 1233234-77-9
- Molecular Formula : C29H60N2O13 
- Molecular Weight : 644.80 
 
	
			                                   
																				Propanoic acid, 3-[2-[2-[2-[[(4-methylphenyl)sulfonyl]oxy]ethoxy]ethoxy]ethoxy]-, methyl ester
Propanoic acid, 3-[2-[2-[2-[[(4-methylphenyl)sulfonyl]oxy]ethoxy]ethoxy]ethoxy]-, methyl ester
- Catalogue No.:PA 27 0030254 
- CAS : - 1239588-09-0
- Molecular Formula : C17H26O8S 
- Molecular Weight : 390.45 
 
	
			                                   
																				4,7,10,13,16,19,22,25,28,31,34,37-Dodecaoxanonatriacontanoic acid, 39-hydroxy-, methyl ester
4,7,10,13,16,19,22,25,28,31,34,37-Dodecaoxanonatriacontanoic acid, 39-hydroxy-, methyl ester
- Catalogue No.:PA 27 0030255 
- CAS : - 1239588-11-4
- Molecular Formula : C28H56O15 
- Molecular Weight : 632.74 
 
	
			                                   
																				9,12,15-Trioxa-6-azaoctadec-17-ynoic acid, 2-[[4-[[(2-amino-3,4-dihydro-4-oxo-6-pteridinyl)methyl]amino]benzoyl]amino]-5-oxo-, (2S)
9,12,15-Trioxa-6-azaoctadec-17-ynoic acid, 2-[[4-[[(2-amino-3,4-dihydro-4-oxo-6-pteridinyl)methyl]amino]benzoyl]amino]-5-oxo-, (2S)
- Catalogue No.:PA 27 0030261 
- CAS : - 1245285-73-7
- Molecular Formula : C28H34N8O8 
- Molecular Weight : 610.63 
 
	
			                                   
																				Carbamic acid, N-[6-(2,5-dihydro-2,5-dioxo-1H-pyrrol-1-yl)hexyl]-, 1,1-dimethylethyl ester
Carbamic acid, N-[6-(2,5-dihydro-2,5-dioxo-1H-pyrrol-1-yl)hexyl]-, 1,1-dimethylethyl ester
- Catalogue No.:PA 27 0030262 
- CAS : - 124529-64-2
- Molecular Formula : C15H24N2O4 
- Molecular Weight : 296.37 
 
	
			                                   
																				5,8,11-Trioxa-2-azatridecanoic acid, 13-[[(4-methylphenyl)sulfonyl]oxy]-, 1,1-dimethylethyl ester
5,8,11-Trioxa-2-azatridecanoic acid, 13-[[(4-methylphenyl)sulfonyl]oxy]-, 1,1-dimethylethyl ester
- Catalogue No.:PA 27 0030266 
- CAS : - 1246999-33-6
- Molecular Formula : C20H33NO8S 
- Molecular Weight : 447.54 
 
	
			                                   
																				4,7,10,13-Tetraoxapentadecanamide, 15-amino-N-[3-(11,12-didehydrodibenz[b,f]azocin-5(6H)-yl)-3-oxopropyl]
4,7,10,13-Tetraoxapentadecanamide, 15-amino-N-[3-(11,12-didehydrodibenz[b,f]azocin-5(6H)-yl)-3-oxopropyl]
- Catalogue No.:PA 27 0030277 
- CAS : - 1255942-08-5
- Molecular Formula : C29H37N3O6 
- Molecular Weight : 523.63 
 
	
			                                   
																				5,8,11,14-Tetraoxa-2,18-diazaheneicosanoic acid, 21-(11,12-didehydrodibenz[b,f]azocin-5(6H)-yl)-17,21-dioxo-, 1,1-dimethylethyl ester
5,8,11,14-Tetraoxa-2,18-diazaheneicosanoic acid, 21-(11,12-didehydrodibenz[b,f]azocin-5(6H)-yl)-17,21-dioxo-, 1,1-dimethylethyl ester
- Catalogue No.:PA 27 0030279 
- CAS : - 1255942-12-1
- Molecular Formula : C34H45N3O8 
- Molecular Weight : 623.75 
 
	
			                                   
																				5,8,11,14,17,20,23,26,29,32,35,38,41,44,47,50,53,56,59,62,65,68,71,74,77-Pentacosaoxa-2-azaoctacontanedioic acid, 1-(9H-fluoren-9-ylmethyl) ester
5,8,11,14,17,20,23,26,29,32,35,38,41,44,47,50,53,56,59,62,65,68,71,74,77-Pentacosaoxa-2-azaoctacontanedioic acid, 1-(9H-fluoren-9-ylmethyl) ester
- Catalogue No.:PA 27 0030281 
- CAS : - 1257223-69-0
- Molecular Formula : C68H117NO29 
- Molecular Weight : 1412.66 
 
	
			                                   
																				5,8,11-Trioxa-2-azatridecanoic acid, 13-azido-N-[2-[2-[2-(2-azidoethoxy)ethoxy]ethoxy]ethyl]-, 1,1-dimethylethyl ester
5,8,11-Trioxa-2-azatridecanoic acid, 13-azido-N-[2-[2-[2-(2-azidoethoxy)ethoxy]ethoxy]ethyl]-, 1,1-dimethylethyl ester
- Catalogue No.:PA 27 0030283 
- CAS : - 1258939-38-6
- Molecular Formula : C21H41N7O8 
- Molecular Weight : 519.60 
 
	
			                                  ![Ethanamine, 2-[2-[2-(2-azidoethoxy)ethoxy]ethoxy]- PA 27 0030284](https://www.pharmaffiliates.com/pimages/PA270030284.jpg) 
																				Ethanamine, 2-[2-[2-(2-azidoethoxy)ethoxy]ethoxy]-N-[2-[2-[2-(2-azidoethoxy)ethoxy]ethoxy]ethyl]
Ethanamine, 2-[2-[2-(2-azidoethoxy)ethoxy]ethoxy]-N-[2-[2-[2-(2-azidoethoxy)ethoxy]ethoxy]ethyl]
- Catalogue No.:PA 27 0030284 
- CAS : - 1258939-39-7
- Molecular Formula : C16H33N7O6 
- Molecular Weight : 419.48 
 
	
			                                   
																				Propanoic acid, 3-[2-[[(1,1-dimethylethoxy)carbonyl]amino]ethoxy]-, 2,5-dioxo-1-pyrrolidinyl ester
Propanoic acid, 3-[2-[[(1,1-dimethylethoxy)carbonyl]amino]ethoxy]-, 2,5-dioxo-1-pyrrolidinyl ester
- Catalogue No.:PA 27 0030288 
- CAS : - 1260092-55-4
- Molecular Formula : C14H22N2O7 
- Molecular Weight : 330.34 
 
	
			                                   
																				4,7,10,13-Tetraoxa-16-azaoctadecanoic acid, 18-bromo-17-oxo-, 2,5-dioxo-1-pyrrolidinyl ester
4,7,10,13-Tetraoxa-16-azaoctadecanoic acid, 18-bromo-17-oxo-, 2,5-dioxo-1-pyrrolidinyl ester
- Catalogue No.:PA 27 0030289 
- CAS : - 1260139-70-5
- Molecular Formula : C17H27BrN2O9 
- Molecular Weight : 483.31 
 
	
			                                   
																				4,7,10,13-Tetraoxa-16-azanonadecanoic acid, 19-(2,5-dihydro-2,5-dioxo-1H-pyrrol-1-yl)-17-oxo
4,7,10,13-Tetraoxa-16-azanonadecanoic acid, 19-(2,5-dihydro-2,5-dioxo-1H-pyrrol-1-yl)-17-oxo
- Catalogue No.:PA 27 0030296 
- CAS : - 1263045-16-4
- Molecular Formula : C18H28N2O9 
- Molecular Weight : 416.43 
 
	
			                                   
																				5,8,11,14,17-Pentaoxa-2-azanonadecanoic acid, 19-[[(4-methylphenyl)sulfonyl]oxy]-, 1,1-dimethylethyl ester
5,8,11,14,17-Pentaoxa-2-azanonadecanoic acid, 19-[[(4-methylphenyl)sulfonyl]oxy]-, 1,1-dimethylethyl ester
- Catalogue No.:PA 27 0030300 
- CAS : - 1264015-76-0
- Molecular Formula : C24H41NO10S 
- Molecular Weight : 535.65 
 
	
			                                   
																				5,8,11,14,17,20-Hexaoxa-2-azadocosanoic acid, 22-[[(4-methylphenyl)sulfonyl]oxy]-, 1,1-dimethylethyl ester
5,8,11,14,17,20-Hexaoxa-2-azadocosanoic acid, 22-[[(4-methylphenyl)sulfonyl]oxy]-, 1,1-dimethylethyl ester
- Catalogue No.:PA 27 0030345 
- CAS : - 1292268-14-4
- Molecular Formula : C26H45NO11S 
- Molecular Weight : 579.70 

 
																				![Ethanethiol, 2-[2-[2-[2-(aminooxy)ethoxy]ethoxy]et PA 27 0030229](https://www.pharmaffiliates.com/pimages/PA270030229.jpg) 
																				 
																				 
																				![Propanoic acid, 3-[2-[[(phenylmethoxy)carbonyl]ami PA 27 0030234](https://www.pharmaffiliates.com/pimages/PA270030234.jpg) 
																				 
																				 
																				 
																				 
																				 
																				 
																				![Phosphonic acid, P-[2-[2-(2-bromoethoxy)ethoxy]et PA 27 0030243](https://www.pharmaffiliates.com/pimages/PA270030243.jpg) 
																				 
																				 
																				 
																				 
																				 
																				 
																				 
																				![Carbamic acid, N-(6-aminospiro[3.3]hept-2-yl)-, 1 PA 27 0030256](https://www.pharmaffiliates.com/pimages/PA270030256.jpg) 
																				 
																				 
																				![1-Propyne, 3-[2-(2-azidoethoxy)ethoxy] PA 27 0030259](https://www.pharmaffiliates.com/pimages/PA270030259.jpg) 
																				 
																				 
																				 
																				 
																				![Hexanamide, N-[2-(methylamino)ethyl] PA 27 0030268](https://www.pharmaffiliates.com/pimages/PA270030268.jpg) 
																				 
																				 
																				![Acetic acid, 2-[2-[2-(2-azidoethoxy)ethoxy]ethoxy] PA 27 0030273](https://www.pharmaffiliates.com/pimages/PA270030273.jpg) 
																				 
																				 
																				 
																				![Propanoic acid, 3-[2-[2-[2-(2-azidoethoxy)ethoxy]e PA 27 0030280](https://www.pharmaffiliates.com/pimages/PA270030280.jpg) 
																				 
																				![Benzene, [[2-(2-azidoethoxy)ethoxy]methyl] PA 27 0030285](https://www.pharmaffiliates.com/pimages/PA270030285.jpg) 
																				![Acetic acid, 2-[2-[[(phenylmethoxy)carbonyl]amino] PA 27 0030286](https://www.pharmaffiliates.com/pimages/PA270030286.jpg) 
																				 
																				 
																				 
																				![Ethanamine, 2-[2-[2-[(6-chlorohexyl)oxy]ethoxy]eth PA 27 0030292](https://www.pharmaffiliates.com/pimages/PA270030292.jpg) 
																				 
																				 
																				 
																				![Butanoic acid, 4-[2-(2-aminoethoxy)ethoxy] PA 27 0030297](https://www.pharmaffiliates.com/pimages/PA270030297.jpg) 
																				 
																				![rel ((1R,8S,9s)-bicyclo[6.1.0]non-4-yn-9-yl)methyl PA 27 0030930](https://www.pharmaffiliates.com/pimages/PA270030930.jpg) 
																				 
																				![Benzenamine, 3-[2-(2-methoxyethoxy)ethoxy] PA 27 0030301](https://www.pharmaffiliates.com/pimages/PA270030301.jpg) 
																				![1-Propyne, 3,3′-[oxybis(2,1-ethanediyloxy)]bis PA 27 0030302](https://www.pharmaffiliates.com/pimages/PA270030302.jpg) 
																				 
																				 
																				![Ethanamine, 2-[2-(phenylmethoxy)ethoxy] PA 27 0030305](https://www.pharmaffiliates.com/pimages/PA270030305.jpg) 
																				 
																				![Propanoic acid, 3-[2-(2-azidoethoxy)ethoxy]-, 1,1- PA 27 0030307](https://www.pharmaffiliates.com/pimages/PA270030307.jpg) 
																				![Propanoic acid, 3-[2-[2-(phenylmethoxy)ethoxy]etho PA 27 0030308](https://www.pharmaffiliates.com/pimages/PA270030308.jpg) 
																				![Propanoic acid, 3-[2-[2-(phenylmethoxy)ethoxy]etho PA 27 0030309](https://www.pharmaffiliates.com/pimages/PA270030309.jpg) 
																				 
																				 
																				![Carbamic acid, N-[2-(2-aminoethoxy)ethyl]-, 1,1-d PA 27 0030313](https://www.pharmaffiliates.com/pimages/PA270030313.jpg) 
																				 
																				 
																				![Benzamide, 4-amino-N-[2-(2-methoxyethoxy)ethyl] PA 27 0030316](https://www.pharmaffiliates.com/pimages/PA270030316.jpg) 
																				 
																				 
																				 
																				![1-Propyne, 3-[2-(2-bromoethoxy)ethoxy] PA 27 0030340](https://www.pharmaffiliates.com/pimages/PA270030340.jpg) 
																				 
																				 
																				 
																				 
																				 
																				 
																				![Hydroxylamine, O-[2-[2-[2-(2-azidoethoxy)ethoxy]e PA 27 0030348](https://www.pharmaffiliates.com/pimages/PA270030348.jpg) 
																				![1-Undecanethiol, 11-[2-[2-(2-hydroxyethoxy)ethoxy] PA 27 0030349](https://www.pharmaffiliates.com/pimages/PA270030349.jpg) 
																				 
																				 
																				 
																				![Ethanol, 2-[(tetrahydro-2H-pyran-2-yl)oxy]-, 1-met PA 27 0030354](https://www.pharmaffiliates.com/pimages/PA270030354.jpg) 
																				![Acetic acid, 2-[2-(phenylmethoxy)ethoxy]-, 1,1-dim PA 27 0030355](https://www.pharmaffiliates.com/pimages/PA270030355.jpg) 
																				 
																				 
 
 
 
