Chlorodihydropyrimidine

**Semantic type:** Organic Chemical|Pharmacologic Substance

**Definition:** A pyrimidine derivative with antitumor activity. Chlorodihydropyrimidine competitively and reversibly inhibits dihydropyrimidine dehydrogenase, a rate-limiting enzyme in the catabolism of fluoropyrimidines thereby blocking the degradation of the fluoropyrimidines.

**Synonyms:** - 5-Chlorodihydropyrimidine