5-O-TBDMS-dG is a modified nucleoside. 5-O-DMT-2-O-TBDMS-rI can be used in the synthesis of deoxyribonucleic acid or nucleic acid. 7-TFA-ap-7-Deaza-dG is a click chemistry reagent, it contains an Alkyne group and can undergo copper-catalyzed azide-alkyne