S1(=O)(=O)C=C(N)C2(O1)C(CO[Si](C)(C)C(C)(C)C)OC(N3C=C(C)C(=O)N(CCCCCCN4C(=O)C(C)=CN(C5CC(N=N=N)C(COP(=O)(Oc6ccccc6)NC(C)C(=O)OC)O5)C4=O)C3=O)C2O[Si](C)(C)C(C)(C)C