C[C@@H](NC(=O)[C@@H]1C[C@]1(C)COC(=O)c1cc([N+](=O)[O-])cc([N+](=O)[O-])c1)c1cccc2ccccc12
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?