S1CC(OC1CO[Si](c2ccccc2)(c3ccccc3)C(C)(C)C)N4C=CC(NC(=O)CCCCC(=O)NC(CC5=CNc6ccccc56)C(=O)NC(C(C)C)C(=O)NC(CC(C)C)C(O)CC(=O)NC(Cc7ccccc7)c8ccccc8)=NC4=O