O=C(NC1CC1)C1CCN(S(=O)(=O)c2cc([N+](=O)[O-])ccc2Cl)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?