ddhCTP is an endogenously produced pyrimidine base analog with a Kd of 17.0 nM for LLDH and an IC50 of 55.8 µM for GAPDH. By inhibiting key metabolic enzymes such as GAPDH, ddhCTP reduces glycolytic flux and shifts metabolic flow toward the pentose phosphate pathway, thereby regulating the redox balance of cells. As a competitive CTP analog, ddhCTP terminates RNA synthesis by flavivirus RdRps and SARS-CoV-2 RdRp, and inhibits Zika virus replication in vivo. ddhCTP can be used in studies related to viral infections, COVID-19 and Zika virus infections.[1][2]