Cc1ccc(S(=O)(=O)N2C3C=CC(C3)[C@@H]2C(Cl)(Cl)Cl)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?