Showing structure for COC(=O)NC(C(=O)N(C(CC1=CC=CC=C1)C(O)CN(CC1=CC=C(C2=CC=CC=C2)C=C1)N(C(=O)C(NC(=O)OC)C(C)(C)C)[Si](C)(C)C)[Si](C)(C)C)C(C)(C)C