Showing structure for CC1=C(CCOP(=O)([O-])OP(=O)([O-])OCC2OC(N3C=NC4=C(N([Si](C)(C)C)[Si](C)(C)C)N=CN=C43)C(O[Si](C)(C)C)C2O)SC(C(=O)[O-])=N1