CC(C)c1ccc(C2N3CC4([N+](=O)[O-])CN2CC([N+](=O)[O-])(C3)C4(C)C)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?