Showing structure for C[Si](C)(C)N=C1N=C(O)C2=C([NH]1)N(C1OC(COP(=O)(O[Si](C)(C)C)OP(=O)(O)OP(O)(=S)O[Si](C)(C)C)C(O)C1O[Si](C)(C)C)C=N2