arabinosylcytosine

ar·a·bi·no·syl·cy·to·sine (aC, araC),

(a'ră-bin-ō-sil-sī'tō-sēn), A compound of arabinose and cytosine, analogous to ribosylcytosine (cytidine), which inhibits the biosynthesis of DNA; used as a chemotherapeutic agent because of its antiviral and tumor-growth-inhibiting properties.

arabinosylcytosine

Therapeutics An antibiotic that blocks DNA synthesis, derived from cytosine by replacing ribose with arabinose