Viltolarsen (NS-065/NCNP-01) sodium is a phosphorodiamidate morpholino antisense oligonucleotide. Viltolarsen sodium binds to exon 53 of the dystrophin mRNA precursor and restores the amino acid open-reading frame by skipping exon 53, resulting in the production of a shortened dystrophin protein that contains essential functional portions. Viltolarsen sodium has the potential for Duchenne muscular dystrophy (DMD) research^[1][2].