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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.
211 products
![[metabolites] (R)-Licarbazepine](https://www.alsachim.com/17311-list_image/-R-Licarbazepine.jpg)
![[metabolites] 2-ethyl-2-phenylpropanediamide](https://www.alsachim.com/20814-list_image/2-ethyl-2-phenylpropanediamide.jpg)
2-ethyl-2-phenylpropanediamide
Product Number: C8353
CAS number: 80866-90-6
Synonyms: Primidone metabolite, PEMA
![[metabolites] 3,4-Dehydro-Cilostazol](https://www.alsachim.com/19937-list_image/3-4-Dehydro-Cilostazol.jpg)
![[reference-standards] 4-Aminobutyric acid](https://www.alsachim.com/17867-list_image/4-Aminobutyric-acid.jpg)
![[metabolites] 4-Epitetracycline hydrochloride salt](https://www.alsachim.com/18135-list_image/4-Epitetracycline-hydrochloride-salt.jpg)
![[metabolites] 4-Hydroxy-N-desmethylmephenytoin](https://www.alsachim.com/15125-list_image/4-Hydroxy-N-desmethylmephenytoin.jpg)
4-Hydroxy-N-desmethylmephenytoin
Product Number: C1669
CAS number: 61837-66-9
Synonyms: 5-Ethyl-5-(p-hydroxyphenyl)hydantoin
![[metabolites] 4-Hydroxymephenytoin](https://www.alsachim.com/15402-list_image/4-Hydroxymephenytoin.jpg)
![[metabolites] 5-Methylurapidil](https://www.alsachim.com/19633-list_image/5-Methylurapidil.jpg)
5-Methylurapidil
Product Number: C6736
CAS number: 34661-85-3
Synonyms: 5-Methyl-6[[3-[4-(2-methoxyphenyl)-1-piperazinyl]propyl]amino]-1,3-dimethyluracil
![[reference-standards] 9-Hydroxymethyl-10-carbamoylacridan](https://www.alsachim.com/15757-list_image/9-Hydroxymethyl-10-carbamoylacridan.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] Betahistine hydrochloride salt](https://www.alsachim.com/17303-list_image/Betahistine-hydrochloride-salt.jpg)
![[reference-standards] Bosentan](https://www.alsachim.com/17574-list_image/Bosentan.jpg)
![[reference-standards] Bosentan sodium salt](https://www.alsachim.com/15315-list_image/Bosentan-sodium-salt.jpg)
![[reference-standards] Brivaracetam](https://www.alsachim.com/20097-list_image/Brivaracetam.jpg)
![[reference-standards] Carbamazepine](https://www.alsachim.com/14804-list_image/Carbamazepine.jpg)
![[metabolites] Carbamazepine-10,11-epoxide](https://www.alsachim.com/15788-list_image/Carbamazepine-10-11-epoxide.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] Demeclocycline](https://www.alsachim.com/19632-list_image/Demeclocycline.jpg)
![[reference-standards] Demeclocycline hydrochloride salt](https://www.alsachim.com/18061-list_image/Demeclocycline-hydrochloride-salt.jpg)