Showing structure for CC1=C2CC3=C(CCC(=O)O)C(C)=C(CC4=C(C)C(CCC(=O)O[Si](C)(C)C)=C(CC5=C(CCC(=O)O)C(C)=C(CC(=C1CCC(=O)O)[NH]2)N5[Si](C)(C)C)[NH]4)N3[Si](C)(C)C