S1SCC2N(C)C(=O)C(C)NC(=O)C(COC(=O)C(C(C)C)N(C)C(=O)C(C1)N(C)C(=O)C(C)NC(=O)C(COC(=O)C(C(C)C)N(C)C2=O)NC(=O)c3nc4ccccc4nc3N)NC(=O)c5nc6ccccc6nc5N