Showing structure for C[Si](C)(C)NC1=NC2=C([NH]C(=O)N2C2OC(COP(=O)([O-])OP(=O)([O-])OP(=O)([O-])[O-])C(O[Si](C)(C)C)C2O[Si](C)(C)C)C(=O)[NH]1