It is a modified NTP for incorporation into messenger RNAs (mRNA) using T7 RNA Polymerase. Incorporation of N1-methylpseudouridine can reduce the immunogenicity of the resulting mRNA. https://nucleotech.bocsci.com/product/n1-methylpseudouridine-5-triphosphate-cas-1428903-59-6-146241.html
