A compound having the formula:
##STR1##
wherein, R1 represents 2'-O-alkylthioalkyl or 2'-C-alkylthioalkyl; X
represents a base or H; Y represents a phosphorus-containing group; and R2
represents H, DMT or a phosphorus-containing group.
Um composto que tem a fórmula: ## do ## STR1 wherein, R1 representa 2'-O-alkylthioalkyl ou 2'-C-alkylthioalkyl; X representam uma base ou um H; Y representa um grupo phosphorus-containing; e R2 representa H, DMT ou um grupo phosphorus-containing.
