O=[N+]([O-])C(=C(Sc1ccccc1)Sc1ccccc1)C(Cl)=C(Cl)Cl
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?