nsc-19893

5-Fluorouracil (5-FU) is a uracil analog, an inhibitor of DNA synthesis. 5-Fluorouracil has antitumor activity and affects pyrimidine synthesis through inhibition of thymidylate synthase. 5-Fluorouracil causes apoptosis and autophagy.

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.