2-Amino-7-cyclopropyl methyl-7,8-dihydro-8-oxo-9-(beta-D-xylo furanosyl)purine (G159-82) PTPD-2 Confidential is a purine nucleoside analogue. Purine nucleoside analogs have broad antitumor activity targeting indolent lymphoid malignancies. Anticancer mechanisms in this process rely on inhibition of DNA synthesis, induction of apoptosis , etc.