Showing structure for C[Si](C)(C)N(C1=NC2=C([NH]C(=O)N2C2OC(COP(=O)([O-])OP(=O)([O-])OP(=O)([O-])[O-])C(O)C2O)C(=O)N1[Si](C)(C)C)[Si](C)(C)C