O=C1C(=Cc2cccs2)C(=O)N(CCc2ccccc2)S(=O)(=O)N1CCc1ccccc1
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?