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

Phosphoramidite for incorporation of a C3 spacer internally or at the 5' end of an oligonucleotide.

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

Monomer for H-phosphonate nucleic acid synthesis.

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