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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.
200 products
![[reference-standards] (R)-Eletriptan](https://www.alsachim.com/18401-list_image/-R-Eletriptan.jpg)
![[reference-standards] (R)-Ibuprofen](https://www.alsachim.com/17452-list_image/-R-Ibuprofen.jpg)
![[reference-standards] (S)-(+)-Ketoprofen](https://www.alsachim.com/15041-list_image/-S---Ketoprofen.jpg)
![[reference-standards] (S)-Ibuprofen](https://www.alsachim.com/17453-list_image/-S-Ibuprofen.jpg)
![[reference-standards] (S)-Naproxen](https://www.alsachim.com/17130-list_image/-S-Naproxen.jpg)
![[reference-standards] (S)-Naproxen sodium salt](https://www.alsachim.com/14781-list_image/-S-Naproxen-sodium-salt.jpg)
![[metabolites] 2-Hydroxyibuprofen](https://www.alsachim.com/14773-list_image/2-Hydroxyibuprofen.jpg)
![[metabolites] 3-Hydroxyibuprofen](https://www.alsachim.com/17198-list_image/3-Hydroxyibuprofen.jpg)
![[metabolites] 4'-Hydroxydiclofenac](https://www.alsachim.com/15498-list_image/4-Hydroxydiclofenac.jpg)
![[metabolites] 4'-Hydroxyflurbiprofen](https://www.alsachim.com/15683-list_image/4-Hydroxyflurbiprofen.jpg)
![[metabolites] 5-Carboxymeloxicam](https://www.alsachim.com/18048-list_image/5-Carboxymeloxicam.jpg)
![[metabolites] 5-Hydroxymeloxicam](https://www.alsachim.com/18049-list_image/5-Hydroxymeloxicam.jpg)
![[reference-standards] Aceclofenac](https://www.alsachim.com/18938-list_image/Aceclofenac.jpg)
![[reference-standards] Acemetacin](https://www.alsachim.com/19656-list_image/Acemetacin.jpg)
![[reference-standards] Acetaminophen](https://www.alsachim.com/15091-list_image/Acetaminophen.jpg)
Acetaminophen
Product Number: C1609
CAS number: 103-90-2
Synonyms: Acetoaminophenol, N-(4-Hydroxyphenyl)-acetamide, N-Acetyl p-aminophenol, Paracetamol
![[metabolites] Acetaminophen β-D-glucuronide](https://www.alsachim.com/20706-list_image/Acetaminophen-beta-D-glucuronide.jpg)
Acetaminophen β-D-glucuronide
Product Number: C9165
CAS number: 16110-10-4
Synonyms: Acetaminophen beta-D-glucuronide
![[reference-standards] Aspirin](https://www.alsachim.com/16999-list_image/Aspirin.jpg)
![[reference-standards] Citalopram hydrobromide
salt](https://www.alsachim.com/15626-list_image/Citalopram-hydrobromide-salt.jpg)
![[reference-standards] Deracoxib](https://www.alsachim.com/19864-list_image/Deracoxib.jpg)
![[metabolites] Desmethylcitalopram](https://www.alsachim.com/16239-list_image/Desmethylcitalopram.jpg)