オリゴヌクレオチドでしょう
origonukureochidodeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of オリゴヌクレオチド

1. Probably an oligonucleotide.; It will likely be an oligonucleotide.

Polite
Presumptive
Conjecture