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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.
28 products
![[reference-standards] Difelikefalin](https://www.alsachim.com/21043-list_image/Difelikefalin.jpg)
![[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] 1-13-Dynorphin A acetate salt](https://www.alsachim.com/19428-list_image/1-13-Dynorphin-A-acetate-salt.jpg)
![[reference-standards] Niflumic acid](https://www.alsachim.com/19649-list_image/Niflumic-acid.jpg)
![[reference-standards] Diflunisal](https://www.alsachim.com/19756-list_image/Diflunisal.jpg)
![[metabolites] Rac-EDDP](https://www.alsachim.com/19785-list_image/Rac-EDDP.jpg)
![[reference-standards] Deracoxib](https://www.alsachim.com/19864-list_image/Deracoxib.jpg)
![[metabolites] Methylnaltrexone bromide salt](https://www.alsachim.com/17122-list_image/Methylnaltrexone-bromide-salt.jpg)
![[metabolites] Morphinan-3-O-β-D-glucuronide](https://www.alsachim.com/17694-list_image/Morphinan-3-O-beta-D-glucuronide.jpg)
Morphinan-3-O-β-D-glucuronide
Product Number: C2064
CAS number: 19153-89-0
Synonyms: Morphinan-3-O-beta-D-glucuronide
![[metabolites] (+)-N-Desmethyltramadol](https://www.alsachim.com/17785-list_image/--N-Desmethyltramadol.jpg)
![[metabolites] O/N-Didesmethyltramadol ß-D-glucuronide](https://www.alsachim.com/17789-list_image/O-N-Didesmethyltramadol-beta-D-glucuronide.jpg)
O/N-Didesmethyltramadol ß-D-glucuronide
Product Number: C2561
CAS number: 383883-84-9
Synonyms: O/N-Didesmethyltramadol beta-D-glucuronide
![[reference-standards] Loperamide](https://www.alsachim.com/17874-list_image/Loperamide.jpg)
![[reference-standards] BU08028](https://www.alsachim.com/17957-list_image/BUb8028.jpg)
![[reference-standards] Tenidap](https://www.alsachim.com/18673-list_image/Tenidap.jpg)
![[reference-standards] JTS 801](https://www.alsachim.com/19129-list_image/JTS-801.jpg)
![[reference-standards] Imrecoxib](https://www.alsachim.com/19259-list_image/Imrecoxib.jpg)
![[reference-standards] Etoricoxib](https://www.alsachim.com/16306-list_image/Etoricoxib.jpg)
![[metabolites] Dextrorphan-β-D-O-glucuronide](https://www.alsachim.com/16549-list_image/Dextrorphan-beta-D-O-glucuronide.jpg)
Dextrorphan-β-D-O-glucuronide
Product Number: C5174
CAS number: 19153-87-8
Synonyms: Dextrorphan-beta-D-O-glucuronide
![[reference-standards] Tramadol hydrochloride salt](https://www.alsachim.com/15397-list_image/Tramadol-hydrochloride-salt.jpg)
![[metabolites] (+)-O-Desmethyltramadol hydrochloride salt](https://www.alsachim.com/15421-list_image/--O-Desmethyltramadol-hydrochloride-salt.jpg)