Showing structure for CN1C[C@H](C(=O)N[C@]2(C)O[C@@]3(O)[C@@H]4CCCN4C(=O)[C@H](CC4=CC=CC=C4)N3C2=O)C=C2C3=CC=CC4=C3C(=CN4[Si](C)(C)C)C[C@H]21