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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.
48 products
![[reference-standards] Betamethasone-17,21-dipropionate](https://www.alsachim.com/15068-list_image/Betamethasone-17-21-dipropionate.jpg)
![[reference-standards] Betamethasone](https://www.alsachim.com/15071-list_image/Betamethasone.jpg)
![[reference-standards] Betamethasone-17-valerate](https://www.alsachim.com/15116-list_image/Betamethasone-17-valerate.jpg)
![[metabolites] 21-Deoxycortisol](https://www.alsachim.com/16882-list_image/21-Deoxycortisol.jpg)
[13C4]-11-Deoxycortisol
Product Number: C6669
CAS number: 152-58-9 unlabeled
Synonyms: 11-Deoxy-17-hydroxycorticosterone-13C4, Reichstein's substance S-13C4, 17,21-Dihydroxyprogesterone-13C4, Cortexolone-13C4
[2H6]-4-Keto 13-cis-retinoic acid
Product Number: C7011
CAS number: 71748-58-8 unlabeled
Synonyms: 4-Oxo-13-cis-retinoic acid-d6, 4-Oxo-isotretinoin-d6
[13C3]-13-cis-Retinoic acid
Product Number: C7239
CAS number: 4759-48-2 unlabeled
Synonyms: 13-cis-Vitamin A acid-13C3, Accutane-13C3, Isotretinoin-13C3
![[reference-standards] Vitamin A](https://www.alsachim.com/16396-list_image/Vitamin-A.jpg)