Showing structure for C[Si](C)(C)N(C(=O)C1=CC=C(N2C=[N+]3C4=C(N=C(N([Si](C)(C)C)[Si](C)(C)C)N([Si](C)(C)C)C4=O)NCC3C2)C=C1)C(CCC(=O)[O-])C(=O)O