L-Ribose-13C is the 13C labeled L-Ribose (HY-W008351). L-Ribose, a non-naturally occurring pentose, is an ideal starting material for use in synthesizing L-nucleosides analogues. L-Ribose can be used for the synthesis of various anticancer and antiviral agents such as Telbivudine (HY-B0017)[1][2].