in this paper , we describe a new ion-pairing high-performance liquid chromatographic assay for ara-c in biological samples that can separate ara-c from its nucleotides , metabolites , and naturally occurring ribonucleotides in a single chromatographic step with a lower limit of quantitation of 5 pmol for ara-c and 10 pmol for ara-ctp .
C0028630
nucleotides
C0035548
ribonucleotides