NC59036
Guanosine, 5′,5′′′,5′′′′′,5′′′′′′′-[[5,11,17,23-tetrakis(methoxymethyl)pentacyclo[19.3.1.13,7.19,13.115,19]octacosa-1(25),3,5,7(28),9,11,13(27),15,17,19(26),21,23-dodecaene-25,26,27,28-tetrayl]tetrakis[oxy(1-oxo-2,1-ethanediyl)imino]]tetrakis[5′-deoxy-2′,3′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-