5fluorouracil13c,15n2

5-Fluorouracil-13C,15N2 is intended for use as an internal standard for the quantification of 5-flurouracil by GC- or LC-MS. 5-Fluorouracil is a pyrimidine analog that irreversibly inhibits thymidylate synthase, blocking the synthesis of thymidine which is required for DNA synthesis. Intracellular metabolites of 5-fluorouracil exert cytotoxic effects by either inhibiting thymidylate synthetase, or through incorporation into RNA and DNA, ultimately initiating apoptosis.

2-Nitrobenzaldehyde semicarbazone (13C, 15N2) is utilized in the LC-MS/MS method for semicarbazide analysis.

1, 14-tetradecanedioic-2, 2, 13, 13-d4 acid is a deuterated compound of 1, 14-tetradecanedioic acid. 1, 14-tetradecanedioic acid has a CAS number of 821-38-5. Tetradecanedioic acid is a C14 dicarboxylic acid.

Gemcitabine EP Impurity C-13C-15N2 is the 13C and 15N labeled compound of Gemcitabine EP Impurity C.

Phthalic acid, bis-2-n-butoxyethyl ester-d4 is a deuterated compound of Phthalic acid, bis-2-n-butoxyethyl ester. Phthalic acid, bis-2-n-butoxyethyl ester has a CAS number of 117-83-9.