2'-Deoxyadenosine-5'-triphosphate-d14 (dATP-d14) dilithium is deuterium labeled 2'-Deoxyadenosine-5'-triphosphate (HY-136648). 2'-Deoxyadenosine-5'-triphosphate (dATP) is a nucleotide used in cells for DNA synthesis (or replication), as a substrate of DNA polymerase.