COC(=O)[C@]1(S(=O)(=O)c2ccccc2)C[C@@H]2ON=C(c3ccc(OC)cc3)[C@@H]2C1
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?