COC(=O)C[C@@H]1C[C@H]2c3cc(NS(=O)(=O)c4ccccc4)ccc3O[C@H]2[C@@H](CO)O1
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?