Phosphoramidite for the incorporation of a carboxylate function either internally or at the 5' end of an oligonucloetide, with a dT nucleobase.

Phosphoramidite for the incorporation of an internal amino function into an oligonucleotide.

Phosphoramidite used to incorporate a deoxythymidine into an oligonucleotide, with an ethylated backbone.

Phosphoramidite used to incorporate a deoxythymidine into an oligonucleotide, with a methylated backbone.

Phosphoramidite for incorporation of an (otherwise unmodified) reverse (5’ to 3’) dT nucleobase within an oligonucleotide.