2-Amino-9-(beta-D-2-deoxyribosyl)purine, with CAS number 3616-24-8, is a nucleoside analog. Its chemical structure consists of a purine base (2-aminopurine) linked to a 2-deoxyribose sugar moiety via a beta-glycosidic bond. This compound is a structural isomer of deoxyadenosine, differing in the position of the amino group on the purine ring. This nucleoside analog is primarily used as a biochemical tool in life science research. It serves as a fluorescent probe and marker due to the intrinsic fluorescence of the 2-aminopurine base, which is sensitive to its local environment. Researchers utilize it to study nucleic acid structure, dynamics, and protein-nucleic acid interactions. It is also investigated as a potential intermediate in the synthesis of modified nucleosides with antiviral or anticancer activities. As a modified deoxyribonucleoside, it falls under the category of nucleoside derivatives, which are fundamental building blocks in nucleic acid chemistry and medicinal chemistry for developing therapeutic agents targeting viral replication or cellular proliferation.