C[C@H]1C[C@@H](C)CN(S(=O)(=O)c2cc(Cl)c(Oc3ccc([N+](=O)[O-])cc3Cl)c(Cl)c2)C1
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?