D-Ribose 5-phosphate disodium is an intermediate of the oxidative branch of the pentose phosphate pathway (PPP) and an end product of the nonoxidative branch of the PPP. D-Ribose 5-phosphate disodium is used in the synthesis of nucleotides and nucleic acids[1].
Ribose-5-phosphate is generally assumed to arise via the oxidative and nonoxidative pentose phosphate pathways[1].
[1]. Grochowski LL, et al. Ribose-5-phosphate biosynthesis in Methanocaldococcus jannaschii occurs in the absence of a pentose-phosphate pathway. J Bacteriol. 2005 Nov;187(21):7382-9.