CC(C)OC(=O)C1CC(C)(O)C(=O)C(C(=O)OC(C)C)C1c1ccc([N+](=O)[O-])cc1
A rotatable bond is defined as any single non-ring bond, attached to a non-terminal, non-hydrogen atom. Amide C-N bonds are not counted because of their high barrier to rotation.  How many rotatable bonds does the molecule have?