126922-67-6 2'-Tbdms-dmfg Guanosine, N-((dimethylamino)methylene)-2'-O-((1,1-dimethylethyl)dimethylsilyl)-, cyclic 3',5'-(butylphosphate), (S)- n-Butyl 2'-dimethyl-tert-butylsilyl-N(2)-(N,N-dimethylamino)methylene-guanosine 3,',5'-cyclic phosphate