Showing structure for C[Si](C)(C)OC(=O)[C@H](CCC(=O)O)N(C(=O)C1=CC=C(NCC2CNC3=C(C(=O)N=C(N([Si](C)(C)C)[Si](C)(C)C)[NH]3)N2[Si](C)(C)C)C=C1)[Si](C)(C)C