Guanosine, N-(2-methyl-1-oxopropyl)-2'-O-[(methylthio)methyl]-3',5'-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-
N-(6-OXO-9-((6AR,8R,9R,9AR)-2,2,4,4-TETRAISOPROPYL-9-((METHYLTHIO)METHOXY)TETRAHYDRO-6H-FURO[3,2-F][1,3,5,2,4]TRIOXADISILOCIN-8-YL)-6,9-DIHYDRO-1H-PURIN-2-YL)IS