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Shimadzu Chemistry & Diagnostics 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.
![[reference-standards] Acrivastine](https://www.schd-shimadzu.com/14356-product_main/Acrivastine.jpg)
Acrivastine
Product Number: C279
CAS number: 87848-99-5
Synonyms: (2E)-3-[6-[(1E)-1-(4-Methylphenyl)-3-(1-pyrrolidinyl)-1-propen-1-yl]-2-pyridinyl]-2-propenoic acid
[13C]-Glyphosate
Product Number: C286
CAS number: 287399-30-8
Synonyms: 2-(Phosphonomethylamino)acetic acid-13C
[15N]-Glyphosate
Product Number: C287
CAS number: 1313261-72-1
Synonyms: 2-(Phosphonomethylamino)acetic acid-15N
[13C,2H3]-Ketoprofen
Product Number: C288
CAS number: 1189508-77-7
Synonyms: 2-(3-Benzoylphenyl)propionic acid-13C-d3
![[reference-standards] Cytisine, racemic mixture](https://www.schd-shimadzu.com/14361-product_main/Cytisine-racemic-mixture.jpg)
![[reference-standards] (E)-N'-(4-Hydroxy-2-methoxybenzylidene)benzo[b]thiophene-2-carbohydrazide](https://www.schd-shimadzu.com/14362-product_main/-E-N--4-Hydroxy-2-methoxybenzylidene-benzo-b-thiophene-2-carbohydrazide.jpg)
(E)-N'-(4-Hydroxy-2-methoxybenzylidene)benzothiophene-2-carbohydrazide
Product Number: C292
CAS number: N/A
![[building-blocks] (E)-N'-(4-Methoxybenzylidene)benzo[b]thiophene-2-carbohydrazide](https://www.schd-shimadzu.com/14364-product_main/-E-N--4-Methoxybenzylidene-benzo-b-thiophene-2-carbohydrazide.jpg)
![[building-blocks] (E)-N'-(4-(Dimethylamino)benzylidene)benzo[b]thiophene-2-carbohydrazide](https://www.schd-shimadzu.com/14365-product_main/-E-N--4-Dimethylamino-benzylidene-benzo-b-thiophene-2-carbohydrazide.jpg)
(E)-N'-(4-(Dimethylamino)benzylidene)benzothiophene-2-carbohydrazide
Product Number: C296
CAS number: N/A
[13C,15N3]-2-Amino-7-(2-bromo-4-fluorophenyl)-4-methyl-7,8-dihydropyridopyrimidin-5(6H)-one
Product Number: C297
CAS number: N/A
Synonyms: [2-13C,Amino,1,3-15N3]-2-Amino-7-(2-bromo-4-fluorophenyl)-4-methyl-7,8-dihydropyrido[4,3-d]pyrimidin-5(6H)-one
![[reference-standards] Cyclopent-3-ene-1-methanol](https://www.schd-shimadzu.com/14367-product_main/Cyclopent-3-ene-1-methanol.jpg)
Cyclopent-3-ene-1-methanol
Product Number: C298
CAS number: 25125-21-7
Synonyms: 1-Hydroxymethylcyclopent-3-ene, 1-Hydroxymethyl-3-cyclopentene
![[reference-standards] Methyl 2-methyloxazole-4-carboxylate](https://www.schd-shimadzu.com/14368-product_main/Methyl-2-methyloxazole-4-carboxylate.jpg)
![[reference-standards] Cyclopent-3-enylmethyl methanesulfonate](https://www.schd-shimadzu.com/14369-product_main/Cyclopent-3-enylmethyl-methanesulfonate.jpg)
![[reference-standards] Arbutin retinoate](https://www.schd-shimadzu.com/14370-product_main/Arbutin-retinoate.jpg)
Arbutin retinoate
Product Number: C319
CAS number: N/A
Synonyms: (2E,4E,6E,8E)-4-((2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yloxy)phenyl 3,7-dimethyl-9-(2,6,6-trimethylcyclohex-1-enyl)nona-2,4,6,8-tetraenoate
![[building-blocks] (S)-Methyl-2-(2-hydroxy-3-nitropyridin-4-ylamino)-3-phenylpropanoate](https://www.schd-shimadzu.com/14371-product_main/-S-Methyl-2-2-hydroxy-3-nitropyridin-4-ylamino-3-phenylpropanoate.jpg)
(S)-Methyl-2-(2-hydroxy-3-nitropyridin-4-ylamino)-3-phenylpropanoate
Product Number: C322
CAS number: N/A
[13C]-Glyphosate
Product Number: C323
CAS number: 287399-31-9
Synonyms: 2-(Phosphonomethylamino)acetic acid-13C
![[building-blocks] (S)-2-Benzyl-5-hydroxy-1,2-dihydropyrido[3,4-b]pyrazin-3(4H)-one](https://www.schd-shimadzu.com/14373-product_main/-S-2-Benzyl-5-hydroxy-1-2-dihydropyrido-3-4-b-pyrazin-3-4H-one.jpg)
[13C]-Glyphosate
Product Number: C325
CAS number: 1071-83-6 unlabeled
Synonyms: 2-(Phosphonomethylamino)acetic acid-13C