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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.
116 products
![[metabolites] 2',2'-Difluorodeoxyuridine](https://www.alsachim.com/16755-list_image/2-2-Difluorodeoxyuridine.jpg)
![[reference-standards] 2',3'-Dideoxyinosine](https://www.alsachim.com/15868-list_image/2-3-Dideoxyinosine.jpg)
![[metabolites] 4-[[(2,4-Diamino-6-pteridinyl)methyl]amino]-benzoic acid sodium salt](https://www.alsachim.com/15253-list_image/4--2-4-Diamino-6-pteridinyl-methyl-amino-benzoic-acid-sodium-salt.jpg)
4-benzoic acid sodium salt
Product Number: C2108
CAS number: 100929-45-1
Synonyms: Desmethyl DAMPA sodium salt, 4-Amino-4-deoxypteroic acid
![[metabolites] 5'-Deoxy-5-fluorocytidine](https://www.alsachim.com/16753-list_image/5-Deoxy-5-fluorocytidine.jpg)
![[metabolites] 5-Fluoro-5'-deoxyuridine](https://www.alsachim.com/14824-list_image/5-Fluoro-5-deoxyuridine.jpg)
![[reference-standards] 6-Thioguanine](https://www.alsachim.com/17167-list_image/6-Thioguanine.jpg)
![[metabolites] 7-Hydroxymethotrexate](https://www.alsachim.com/14363-list_image/7-Hydroxymethotrexate.jpg)
7-Hydroxymethotrexate
Product Number: C293
CAS number: 5939-37-7
Synonyms: 7-OHMTX, (S)-2-(4-(((2,4-Diamino-7-hydroxypteridin-6-yl)methyl)(methyl)amino)benzamido)pentanedioic acid, 4-Amino-7-hydroxy-10-methylpteroylglutamic acid, 7-Hydroxyamethopterin
![[products] Abacavir sulfate salt](https://www.alsachim.com/15382-list_image/Abacavir-sulfate-salt.jpg)
![[reference-standards] Belnacasan](https://www.alsachim.com/19189-list_image/Belnacasan.jpg)
Belnacasan
Product Number: C5851
CAS number: 273404-37-8
Synonyms: VX-765, (2S)-1-[(2S)-2-[(4-Amino-3-chlorobenzoyl)amino]-3,3-dimethylbutanoyl]-N-[(2R,3S)-2-ethoxy-5-oxooxolan-3-yl]pyrrolidine-2-carboxamide
![[reference-standards] Brivaracetam](https://www.alsachim.com/20097-list_image/Brivaracetam.jpg)
![[reference-standards] Calcium levofolinate](https://www.alsachim.com/19355-list_image/Calcium-levofolinate.jpg)
Calcium levofolinate
Product Number: C6053
CAS number: 80433-71-2
Synonyms: Elvorine, Isovorin, Calcium (2S)-2-[[4-[[(6S)-2-amino-5-formyl-4-oxo-1,6,7,8-tetrahydropteridin-6-yl]methylamino]benzoyl]amino]pentanedioate
![[reference-standards] Capecitabine](https://www.alsachim.com/15079-list_image/Capecitabine.jpg)
![[reference-standards] Carbovir](https://www.alsachim.com/18201-list_image/Carbovir.jpg)
![[reference-standards] Carisbamate](https://www.alsachim.com/17775-list_image/Carisbamate.jpg)
![[reference-standards] Cenobamate, racemic mixture](https://www.alsachim.com/20690-list_image/Cenobamate-racemic-mixture.jpg)
![[reference-standards] Cytarabine](https://www.alsachim.com/15776-list_image/Cytarabine.jpg)
![[reference-standards] DAMPA](https://www.alsachim.com/15446-list_image/DAMPA.jpg)
![[reference-standards] DAMPA hemihydrochloride salt monohydrate](https://www.alsachim.com/15252-list_image/DAMPA-hemihydrochloride-salt-monohydrate.jpg)
DAMPA hemihydrochloride salt monohydrate
Product Number: C2107
CAS number: 19741-14-1 as the anhydrous base
Synonyms: 4-[[(2,4-Diamino-6-pteridinyl)methyl]methylamino]-Benzoic acid hydrate hydrochloride
![[metabolites] Desmethyl-lacosamide](https://www.alsachim.com/18081-list_image/Desmethyl-lacosamide.jpg)
![[reference-standards] Didanosine](https://www.alsachim.com/17985-list_image/Didanosine.jpg)