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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.

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[reference-standards] Levomefolate calcium salt

Levomefolate calcium salt

Product Number: C6234

CAS number: 151533-22-1

Synonyms: LMCA, Metafolin, 5-Methyl-tetrahydrofolate calcium salt, L-Methylfolate calcium salt

[metabolites] Tenofovir alafenamide

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

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[13C6]-Folic acid

Product Number: C7411

CAS number: 161406-20-8

Synonyms: N-[4-[[(2-Amino-3,4-dihydro-4-oxo-6-pteridinyl)methyl]amino]benzoyl]-L-glutamic acid-13C6, Vitamin B9-13C6

[reference-standards] Didanosine

Didanosine

Product Number: C3058

CAS number: 69655-05-6

Synonyms: 2',3'-Dideoxyinosine

[reference-standards] Stavudine

Stavudine

Product Number: C3250

CAS number: 3056-17-5

Synonyms: 2',3'-Didehydro-3'-deoxy-thymidine

[reference-standards] Zalcitabine

Zalcitabine

Product Number: C3738

CAS number: 7481-89-2

Synonyms: ddC, 2',3'-Dideoxycytidine