dGTP-13C10,15N5 (2-Deoxyguanosine-5-triphosphate-13C10,15N5) dilithium is a dGTP labeled with 13C and 15N. dGTP (2-Deoxyguanosine-5-triphosphate) is a guanine nucleotide used in the synthesis of deoxyribonucleic acid. Guanine nucleotides (GDP, GTP, dGDP, dGTP) are highly susceptible to oxidative damage, specifically with 8-O-GDP, 8-O-dGTP, 8-O-GTP, and 8-O-dGTP.