CC(C)(C)C(=O)Nc1ccc(C(=O)Nc2cc(NC(=O)c3ccc(NC(=O)C(C)(C)C)cc3)cc(C(=O)O)c2)cc1
A rotatable bond is defined as any single non-ring bond, attached to a non-terminal, non-hydrogen atom. How many bonds in the molecule are rotatable?