Deoxythymidine-5-triphosphate-13C10 (dTTP-13C10) dilithium is 13C-labeled Deoxythymidine-5-triphosphate (HY-138615). Deoxythymidine-5-triphosphate (dTTP) is one of the four nucleoside triphosphates. Deoxythymidine-5-triphosphate (dTTP) is used in the synthesis of DNA.