Showing structure for C[Si](C)(C)OC(=O)CCC(NC(=O)CCC(NC(=O)C1=CC=C(N(CC2CNC3=C(N2)C(=O)[NH]C(N([Si](C)(C)C)[Si](C)(C)C)=N3)[Si](C)(C)C)C=C1)C(=O)O)C(=O)O