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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.
[13C,2H3]-Asenapine maleate salt, racemic mixture
Product Number: C1093
CAS number: 1217729-73-1 free base
![[reference-standards] Bosentan](https://www.alsachim.com/17574-list_image/Bosentan.jpg)
![[metabolites] Amlodipine carboxylic acid](https://www.alsachim.com/17610-list_image/Amlodipine-carboxylic-acid.jpg)
![[metabolites] Desmethylnorgalanthamine](https://www.alsachim.com/17621-list_image/Desmethylnorgalanthamine.jpg)
Desmethylnorgalanthamine
Product Number: C1502
CAS number: 164854-59-5
Synonyms: N,O-Didemethylgalanthamine
[13C,2H3]-Teniposide
Product Number: C1522
CAS number: 29767-20-2 unlabeled
Synonyms: [13C,2H3]-VM-26
![[reference-standards] Sotrastaurin](https://www.alsachim.com/17638-list_image/Sotrastaurin.jpg)
[13C6]-Kaempferol-3-O-β-D-glucuronide
Product Number: C1602
CAS number: 22688-78-4 unlabeled
Synonyms: [13C6]-Kaempferol-3-O-beta-D-glucuronide
![[reference-standards] Artesunate product 23](https://www.alsachim.com/17680-list_image/Artesunate-product-23.jpg)
![[reference-standards] Artesunate](https://www.alsachim.com/17681-list_image/Artesunate.jpg)
![[metabolites] Hydroxymethylcelecoxib](https://www.alsachim.com/17797-list_image/Hydroxymethylcelecoxib.jpg)
![[metabolites] Celecoxib carboxylic acid](https://www.alsachim.com/17799-list_image/Celecoxib-carboxylic-acid.jpg)
![[reference-standards] Androsta-1,4-diene-3,17-dione](https://www.alsachim.com/17818-list_image/Androsta-1-4-diene-3-17-dione.jpg)
Androsta-1,4-diene-3,17-dione
Product Number: C2683
CAS number: 897-06-3
Synonyms: Androstadienedione, Androstenedione analogue
![[reference-standards] Betamethasone-21 acetate salt](https://www.alsachim.com/17820-list_image/Betamethasone-21-acetate-salt.jpg)