After incorporation into an oligonucleotide, irradiation at 365 nm causes strand cleavage, leaving a phosphate on the 5' end and a hydroxyl residue on the 3' end.

This phosphoramidite allows incorporation of an etheno bridged dG moiety internally or at the 5’ end of an oligonucleotide.

Allows the introduction of a 5-aminoallyl-deoxyuridine residue into oligonucleotides for the purpose of post-synthetic labeling by acylation.