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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.

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[13C,2H3]-7-Hydroxymethotrexate

Product Number: C289

CAS number: 5939-37-7 unlabeled

Synonyms: 13C-2H3-7-OHMTX, (S)-2-(4-(((2,4-Diamino-7-hydroxypteridin-6-yl)methyl)(methyl)amino)benzamido)pentanedioic acid-13C-d3, 4-Amino-7-hydroxy-10-methylpteroylglutamic acid-13C-d3, 7-Hydroxyamethopterin-13C-d3

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[13C5]-Pralatrexate

Product Number: C3998

CAS number: 146464-95-1 unlabeled

Synonyms: N-[4-[1-[(2,4-diamino-6-pteridinyl)methyl]-3-butyn-1-yl]benzoyl]-L-glutamic acid-13C5

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[13C6]-Thiotepa

Product Number: C264

CAS number: 52-24-4 unlabeled

Synonyms: [U-13C6]-1,1',1''-Phosphinothioylidynetris-aziridine, [U-13C6]-N,N',N?-Triethylenethiophosphoramide, [U-13C6]-Thiofozil, [U-13C6]-Tiofosyl, [U-13C6]-Thio-Tep

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[13C6]-Ripretinib

Product Number: C9272

CAS number: 1442472-39-0 unlabeled

Synonyms: [13C6]-Qinlock, [13C6]-DCC 2618, [13C6]-DP 2618, [13C6]-1-[4-Bromo-5-[1-ethyl-7-(methylamino)-2-oxo-1,2-dihydro-1,6-naphthyridin-3-yl]-2-fluorophenyl]-3-phenylurea