NC51001
5'-O-(2,4-Dihydroxy-2,4-dioxido-3,5,9-trioxa-2,4-diphosphapentacos-1-yl)-1'-C-methylcytidine
NC50999
5'-O-(2,4-Dihydroxy-2,4-dioxido-3,5,8-trioxa-2,4-diphosphahexacos-1-yl)-2'-C-methyladenosine
