Showing structure for C[Si](C)(C)N(C(=O)C1=CC=C(NCC2CNC3=C(C(=O)N=C(N([Si](C)(C)C)[Si](C)(C)C)N3[Si](C)(C)C)N2C=O)C=C1)C(CCC(=O)[O-])C(=O)[O-]