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