Showing structure for C[Si](C)(C)O[C@@H]1[C@H](OP(=O)([O-])[O-])[C@@H](COP(=O)([O-])OS(=O)(=O)[O-])O[C@H]1N1C=NC2=C(N([Si](C)(C)C)[Si](C)(C)C)N=CN=C21