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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.
100 products
![[reference-standards] 10-Demethylcolchicine](https://www.alsachim.com/18996-list_image/11-Demethylcolchicine.jpg)
![[reference-standards] 2',3'-Dideoxyinosine](https://www.alsachim.com/15868-list_image/2-3-Dideoxyinosine.jpg)
![[reference-standards] 2-Demecolchicine](https://www.alsachim.com/18993-list_image/2-Demecolchicine.jpg)
![[metabolites] 3-Demethylcolchicine](https://www.alsachim.com/18987-list_image/3-Demethylcolchicine.jpg)
![[reference-standards] 4'-Demethylepipodophyllotoxin](https://www.alsachim.com/19336-list_image/4-Demethylepipodophyllotoxin.jpg)
4'-Demethylepipodophyllotoxin
Product Number: C6030
CAS number: 6559-91-7
Synonyms: 4'-DMEP, (5S,5aR,8aR,9R)-5-Hydroxy-9-(4-hydroxy-3,5-dimethoxyphenyl)-5a,6,8a,9-tetrahydro-5H-[2]benzofuro[5,6-f][1,3]benzodioxol-8-one
![[metabolites] 6-α-Hydroxypaclitaxel](https://www.alsachim.com/15964-list_image/6-alpha-Hydroxypaclitaxel.jpg)
6-α-Hydroxypaclitaxel
Product Number: C3843
CAS number: 153212-75-0
Synonyms: 6-a-Hydroxypaclitaxel, 6-alpha-Hydroxytaxol
![[products] Abacavir sulfate salt](https://www.alsachim.com/15382-list_image/Abacavir-sulfate-salt.jpg)
![[reference-standards] Acrivastine](https://www.alsachim.com/14356-list_image/Acrivastine.jpg)
Acrivastine
Product Number: C279
CAS number: 87848-99-5
Synonyms: (2E)-3-[6-[(1E)-1-(4-Methylphenyl)-3-(1-pyrrolidinyl)-1-propen-1-yl]-2-pyridinyl]-2-propenoic acid
![[reference-standards] Acrivastine isomer Z](https://www.alsachim.com/14597-list_image/Acrivastine-isomer-Z.jpg)
Acrivastine isomer Z
Product Number: C3208
CAS number: 1057138-89-2
Synonyms: (2E)-3-[6-[(1Z)-1-(4-Methylphenyl)-3-(1-pyrrolidinyl)-1-propen-1-yl]-2-pyridinyl]-2-propenoic acid
![[reference-standards] Ara-uridine](https://www.alsachim.com/17390-list_image/Ara-uridine.jpg)
Ara-uridine
Product Number: C7566
CAS number: 3083-77-0
Synonyms: 1-ß-D-Arabinofuranosyluracil, Spongouridine
![[reference-standards] Bilastine](https://www.alsachim.com/19579-list_image/Bilastine.jpg)
![[reference-standards] Brivudine](https://www.alsachim.com/19884-list_image/Brivudine.jpg)
![[reference-standards] Carbidopa monohydrate](https://www.alsachim.com/16993-list_image/Carbidopa-monohydrate.jpg)
![[reference-standards] Carbovir](https://www.alsachim.com/18201-list_image/Carbovir.jpg)
![[metabolites] Carebastine](https://www.alsachim.com/14894-list_image/Carebastine.jpg)
![[reference-standards] Cetirizine dihydrochloride salt](https://www.alsachim.com/14971-list_image/Cetirizine-dihydrochloride-salt.jpg)
![[reference-standards] Colchicine](https://www.alsachim.com/16573-list_image/Colchicine.jpg)
![[reference-standards] D-64131](https://www.alsachim.com/19372-list_image/D-64131.jpg)
![[reference-standards] Demecolcine](https://www.alsachim.com/18997-list_image/Demecolcine.jpg)
![[metabolites] Descarboethoxyloratadine](https://www.alsachim.com/15998-list_image/Descarboethoxyloratadine.jpg)