O=C(C[C@H]1C[C@@H]2c3cc(NS(=O)(=O)c4ccccc4)ccc3O[C@@H]2[C@H](CO)O1)N1CCOCC1
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?