m(7)G5'ppp5'N(3'ppp5'N)n
m(7)g5'ppp5'n(3'ppp5'n)n
An oligonucleotide comprised of 7'-methylguanosine connected via a triphosphate linkage from its 5'-position to the 5'-position of a ribonucleotide, in turn connected through a (3'→5') triphosphate linkage to a chain of (3'→5') triphosphate-linked ribonucleotide residues. The number of nucleotide residues in the chain is between 1 and 8.