COc1cc(S(=O)(=O)Nc2nc(-c3ccc(N4C(=O)CSC4c4cccs4)cc3)cs2)ccc1Cl
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?