CC(C)(C)CC(C)(C)NC1=NC2=NC(=N1)N(CCCCCCN(C1CC(C)(C)NC(C)(C)C1)C1=NC(NC(C)(C)CC(C)(C)C)=NC(=N1)N(CCCCCCN2C1CC(C)(C)NC(C)(C)C1)C1CC(C)(C)NC(C)(C)C1)C1CC(C)(C)NC(C)(C)C1