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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.
89 products
![[stable-labeled-standards] [2H4]-2',3'-Dideoxyinosine](https://www.alsachim.com/17709-list_image/-2H4-2-3-Dideoxyinosine.jpg)
2',3'-Dideoxyinosine
Product Number: C2111
CAS number: 69655-05-6 unlabeled
Synonyms: [2H4]-Didanosine
[13C5]-Didanosine
Product Number: C2475
CAS number: 503173-93-1
Synonyms: [13C5]-2',3'-Dideoxyinosine
![[reference-standards] Darusentan](https://www.alsachim.com/17762-list_image/Darusentan.jpg)
[13C6]-Darusentan
Product Number: C2510
CAS number: 1261365-22-3
Synonyms: [13C6]-(alphaS)-alpha-[(4,6-Dimethoxy-2-pyrimidinyl)oxy]-beta-
[13C,2H3]-Darusentan
Product Number: C2511
CAS number: 1261392-44-2
Synonyms: [13C,2H3]-(alphaS)-alpha-[(4,6-Dimethoxy-2-pyrimidinyl)oxy]-beta-methoxy-beta-phenyl-benzenepropanoic acid
![[reference-standards] N-(6-fluoro-1H-indazol-5-yl)-1,4,5,6-tetrahydro-2-methyl-6-oxo-4-[4-(trifluoromethyl)phenyl]-3-Pyridinecarboxamide](https://www.alsachim.com/17793-list_image/N-6-fluoro-1H-indazol-5-yl-1-4-5-6-tetrahydro-2-methyl-6-oxo-4-4-trifluoromethyl-phenyl-3-Pyridinecarboxamide.jpg)
N-(6-fluoro-1H-indazol-5-yl)-1,4,5,6-tetrahydro-2-methyl-6-oxo-4-3-Pyridinecarboxamide
Product Number: C2581
CAS number: 864082-47-3
Synonyms: GSK 42986
![[reference-standards] Didanosine](https://www.alsachim.com/17985-list_image/Didanosine.jpg)
![[reference-standards] Stavudine](https://www.alsachim.com/18071-list_image/Stavudine.jpg)
![[reference-standards] Zalcitabine](https://www.alsachim.com/18121-list_image/Zalcitabine.jpg)
![[metabolites] Ramipril acyl](https://www.alsachim.com/18164-list_image/Ramipril-acyl.jpg)
![[reference-standards] Carbovir](https://www.alsachim.com/18201-list_image/Carbovir.jpg)
![[reference-standards] Tafluprost](https://www.alsachim.com/18351-list_image/Tafluprost.jpg)
[2H7]-Tafluprost
Product Number: C3948
CAS number: 209860-87-7 unlabeled
Synonyms: [2H7]-Tapros, [2H7]-Taflotan