5-Methylcytidine 5′-triphosphate (5-Methyl-CTP) trisodium is a modified nucleoside triphosphate. 5-Methylcytidine 5′-triphosphate trisodium can apply in replacing unmodified mRNA, resulting in the increase of translational properties and stability, as well as the reduction of innate immune responses in human and other mammalian cells[1].