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Alsachim offers you its expertise and know-how in isotope enrichment labeling (13C, 2H, 15N, 18O, 34S) to quantify your compounds by LC-MS/MS analysis. Our teams synthesize labeled internal standards and reference standards, as well as metabolites and building blocks.
41 products
![[reference-standards] Riociguat](https://www.alsachim.com/16386-list_image/Riociguat.jpg)
![[metabolites] 4'-Hydroxyphenylcarvedilol](https://www.alsachim.com/14983-list_image/4-Hydroxyphenylcarvedilol.jpg)
![[metabolites] 5'-Hydroxyphenylcarvedilol](https://www.alsachim.com/15109-list_image/5-Hydroxyphenylcarvedilol.jpg)
5'-Hydroxyphenylcarvedilol
Product Number: C1644
CAS number: 142227-51-8
Synonyms: Carvedilol metabolite M5
![[reference-standards] Ambrisentan](https://www.alsachim.com/15237-list_image/Ambrisentan.jpg)
![[metabolites] 4-Hydroxymethylambrisentan](https://www.alsachim.com/15277-list_image/4-Hydroxymethylambrisentan.jpg)
![[metabolites] Ambrisentan acyl-β-D-glucuronide](https://www.alsachim.com/15598-list_image/Ambrisentan-acyl-beta-D-glucuronide.jpg)
Ambrisentan acyl-β-D-glucuronide
Product Number: C3131
CAS number: 1106685-58-8
Synonyms: Ambrisentan acyl-beta-D-glucuronide
![[reference-standards] Terazosin hydrochloride salt](https://www.alsachim.com/20204-list_image/Terazosin-hydrochloride-salt.jpg)
Terazosin hydrochloride salt
Product Number: C7012
CAS number: 63074-08-8
Synonyms: Abbott 45975, 1-(4-Amino-6,7-dimethoxy-2-quinazolinyl)-4-[(tetrahydro-2-furanyl)carbonyl]piperazine hydrochloride
![[reference-standards] Selexipag active metabolite](https://www.alsachim.com/20218-list_image/Selexipag-active-metabolite.jpg)
![[reference-standards] Travoprost acid](https://www.alsachim.com/20235-list_image/Travoprost-acid.jpg)
![[metabolites] Lamivudine Triphosphate triethylammonium salt](https://www.alsachim.com/19382-list_image/Lamivudine-Triphosphate-triethylammonium-salt.jpg)
Lamivudine Triphosphate triethylammonium salt
Product Number: C6095
CAS number: 1187058-42-9
Synonyms: Lamivudine metabolite
![[reference-standards] (R)-Doxazosin](https://www.alsachim.com/19509-list_image/-R-Doxazosin.jpg)
![[reference-standards] (S)-Doxazosin](https://www.alsachim.com/19510-list_image/-S-Doxazosin.jpg)
![[reference-standards] Doxazosin](https://www.alsachim.com/19511-list_image/Doxazosin.jpg)
![[metabolites] Prazosin N-Glucuronide](https://www.alsachim.com/19551-list_image/Prazosin-N-Glucuronide.jpg)
![[reference-standards] Treprostinil](https://www.alsachim.com/16694-list_image/Treprostinil.jpg)
![[reference-standards] Treprostinil sodium salt](https://www.alsachim.com/16751-list_image/Treprostinil-sodium-salt.jpg)
![[reference-standards] Sacubitril sodium salt](https://www.alsachim.com/16954-list_image/Sacubitril-sodium-salt.jpg)
![[metabolites] Sacubitril metabolite LBQ 657](https://www.alsachim.com/16955-list_image/Sacubitril-metabolite-LBQ-657.jpg)
![[metabolites] Tenofovir alafenamide](https://www.alsachim.com/17013-list_image/Tenofovir-alafenamide.jpg)
Tenofovir alafenamide
Product Number: C6620
CAS number: 379270-37-8
Synonyms: GS-7171 fumarate // [2H6]-N-[[[(1R)-2-(6-Amino-9H-purin-9-yl)-1-methylethoxy]methyl]phenoxyphosphinyl]-1-methylethyl ester-L-alanine fumarate
![[metabolites] Tenofovir diphosphate](https://www.alsachim.com/17017-list_image/Tenofovir-diphosphate-salt.jpg)